Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f64565b832dcb5…

MALICIOUS

PDF

71.9 KB Created: 2020-09-04 22:39:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f33373cf0f38bdc549c1a676794d501a SHA-1: 208c6142f709d17127d4850408fb4e3a3e69f650 SHA-256: f0f64565b832dcb529b8bb36e9a242a9a0cfcb1b2c22dbeba9549008b2010b62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=renaissance+performing+arts+center+montgomery+al In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a838c0_6b8ad10195dd4e0689d3fb735c7ba1ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e5cbe5_748d5e4b4c3941a1a7076a9716f3a939.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0f5b72_6b71b776dc68494192518df6935155f4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6812d7_d6333d1e671c430e894c6730a4abee1f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/966478_0396b6ed66a7423382bbf9392a98e71d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/my_bonnie_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/sensory_integration_and_the_child_understanding_hidden_sensory_challenges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9840/5781/files/whatsapp_gb_transparent_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/26767434151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/kemitewuzarotux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/13323342524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/nifusoxolutorun.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_709a31ecfa7e47c988565941733deeed.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e8506d_5685254ef0f04060bf8de061b8b2447d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/756799_3a9dedf1d1e64c1298b36835a95f5723.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7ed05_de7ec7e3466448ab9a87fd6d5c6d4c9d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c8c29c79a7f448749bddf96ccd054b96.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
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 6676 bytes
SHA-256: cfef93ef1a9386f573262ba4d0c521a1e00c6f7c161407f73f62091bd797ec36
font_01_sfnt_off000089c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C3 5444 bytes
SHA-256: 318c9d2b09a82377e33406846aa98b8232e97109658dddb92bf24944328b6a87
font_02_sfnt_off00009c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3E 19392 bytes
SHA-256: ff88d8c3bba60fdf3a29a29f260b61aa06181529f165be35bca4503bcd462251
font_03_sfnt_off0000d3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 10768 bytes
SHA-256: 8a1163aa91d3175c267007ce69f1a65de9755689e733cb666839d01e87b28252
font_04_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 16436 bytes
SHA-256: dafde187fedfd4442ae3501653e2d41a601125215a854713cb373a0ba5d0d6fe

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