Malicious PDF — malware analysis report

Static analysis result for SHA-256 08316b2f0cc3f394…

MALICIOUS

PDF

62.8 KB Created: 2020-08-17 11:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 951a02cdc59c21905801f0db8816991a SHA-1: 3cf58344e1c44c126b9f39a4672e7db0351384e2 SHA-256: 08316b2f0cc3f3949d5f4b7eec676ba3d21d4a5bdd54f2175b35f53be381126e
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a critical risk, pointing to the URL https://ttraff.com/pify?keyword=apus+launcher+free++apk. The presence of numerous other PDF links suggests a link farm, potentially for SEO manipulation or distributing further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=apus+launcher+free++apk
    • http://files.fibonaccimotors.com/uploads/1/3/2/8/132814935/manexedut.pdf
    • http://kusem.jaimeclanachan.com/uploads/1/3/1/8/131856998/6997678.pdf
    • http://files.kghousingcoop.ca/uploads/1/3/1/8/131859261/notoxabefexed.pdf
    • http://files.fhmscounseling.org/uploads/1/3/1/4/131454024/3443812.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/gixugitimasog.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/canales_de_aprendizaje_visual_auditivo_y_kinestesico.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/kijemutukebif.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/pofizarelifoxutedofuzela.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/gapov.pdf
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/lededuzi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/dynamic_business_law_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5619/1893/files/bol_bam_ke_gana_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/sejefifular.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/43246074274.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000b993.bin
45d2f0397cb3ecd86305168f98b4ff7e2b81df4465c8de1d61d70494754d662c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB993 17380 bytes
font_00_sfnt_off000060f8.bin
ecea2c7a2aba2e8dc08959a5de57812338e67fc6b8830b4219b26e0ea7750c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 5628 bytes
font_01_sfnt_off000074a4.bin
21687f0fd77c8e2814009b4bda517a6a7bd3723a0f0bdaa2e927f4169dd1d035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A4 4800 bytes
font_02_sfnt_off000084d2.bin
593a452f0795506ac97007ad32b21767cc543cb1bc716fd74108abb5279d52e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D2 6640 bytes
font_03_sfnt_off00009670.bin
8ce77780f764a2d16e55e058179f35aabd7e8bbe0c05025483ad0eedb27ab5b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9670 10344 bytes
font_05_sfnt_off0000d347.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD347 4324 bytes
font_06_sfnt_off0000e148.bin
d7a1248cabf161ff78a072bd924b98f1b4e551660f4e151c9433689786990c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE148 2832 bytes

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