Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaa0d4ffc220eab…

MALICIOUS

PDF

96.5 KB Created: 2020-08-25 16:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ea47158dcb389001f6f913c209cdea58 SHA-1: 0cda780ae07f45691afa14d46cceb3a54628dbee SHA-256: bbaa0d4ffc220eab7511dbdc8455040cf0dcb40bb2438ac13e578fe86fec2bd8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body also contains a URL that points to a redirector, suggesting an attempt to direct users to malicious sites. The presence of a link farm heuristic further indicates a malicious intent to distribute or redirect traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=illicit+desire+2017+subtitles In PDF document text
    • http://files.annetrauben.com/uploads/1/3/1/4/131408432/xiderapipitas-gogepaxuj.pdfIn PDF document text
    • http://files.baglancommunity.org/uploads/1/3/0/8/130814245/liluwuwotenoka.pdfIn PDF document text
    • http://files.debbiegouldenart.co.uk/uploads/1/3/0/9/130968968/79cc5d6216e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1804/3040/files/pagixikiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/pancreatic_hormones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/evolution_of_bryophytes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7422/8117/files/gokanefasegaxazizegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/jodi_picoult_handle_with_care_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/you_re_the_reason_piano_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7766/2875/files/descriptive_writing_worksheet_ks2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/50476523901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/besupirasimoxedeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/nejoneziluzolesigetadus.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 15

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off00014053.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14053 18892 bytes
SHA-256: 41106fe9a07ceeb1833557e0ab2cfbd1aaa01bb8b874b05d5e7cc5f1a8674fa4
font_00_sfnt_off000059c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C7 7916 bytes
SHA-256: e59037b55eb65fa6455cf1c6287e33a9d16be46809afb7af2e33fa14b570a7d3
font_01_sfnt_off00006e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 8948 bytes
SHA-256: 51f26f5b226f52e790b15363824dfa38f10a664859bd9407537487cebd23085c
font_02_sfnt_off00008cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 5208 bytes
SHA-256: a3e8a343d31842f9d106621659203ddf344eb0a062321d8b629b896b0d936a65
font_03_sfnt_off00009e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E80 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_04_sfnt_off0000a982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA982 4140 bytes
SHA-256: 119132d4d86df12b64aacef50f1aeac69cc60fdd8dbe27b6e2ceb22654f0acbc
font_05_sfnt_off0000b69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69F 3048 bytes
SHA-256: 1b68eb0745f369bd9f805b89718582bd6ebaf917deeaaae5095027b3f32dc7b8
font_06_sfnt_off0000c2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AC 2328 bytes
SHA-256: c42118b51b061dffbc196cd4866a2cf76d9f31ae9d0a8f6c06e6ad224a677b24
font_07_sfnt_off0000cd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD63 2604 bytes
SHA-256: d07a9fdf75b1e191e7a1ea25e2941b9f689ff98e7e435169aef8b5fb7be41b17
font_08_sfnt_off0000d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 3840 bytes
SHA-256: 5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872
font_09_sfnt_off0000e64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 2108 bytes
SHA-256: 806d12f4c18e044784d20764d58024893796e88f204c306662924b3e907cbcac
font_10_sfnt_off0000f023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_11_sfnt_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 6148 bytes
SHA-256: be38186c9256ba0e64b07d34cca2e63b176d3ffd182ae4667a642b503e748fe0
font_12_sfnt_off00010dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAD 16432 bytes
SHA-256: 6571589436249eef68030f7ae0da6684f210acfdce8274af2a3418848f48f8b4
font_14_sfnt_off00015faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FAF 3536 bytes
SHA-256: ecf51c2dbb9281b20c5dc3daf9ad1c9b9cc7ec56331f29427b924fb34bf6c063

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