Malicious PDF — malware analysis report

Static analysis result for SHA-256 6777ab1dae0acea7…

MALICIOUS

PDF

53.6 KB Created: 2020-09-09 23:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aa413d083fdbaa3fc72f8e03c6cff0f SHA-1: 8b2ebcb8ab141df12076960f182c3304035122e9 SHA-256: 6777ab1dae0acea741af4f144f4047d193848ea593618f5ba9e9e83a3c50c444
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 known malicious redirector. The document body, though partially corrupted, includes a URL that appears to be part of a lure. The presence of a large number of external links suggests a link farm or SEO poisoning tactic, aiming to drive traffic to malicious infrastructure.

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.club/wix?keyword=wow+mop+destruction+warlock+guide
    • http://files.pranarasa.com/uploads/1/3/1/4/131407227/2108322.pdf
    • http://files.ssyyogalife.org/uploads/1/3/1/3/131381722/jebejobudom.pdf
    • http://files.countrywalkvet.com/uploads/1/3/0/7/130776682/gumazuvipagid_benufureju.pdf
    • http://vexexim.amyziserevents.com/uploads/1/3/1/4/131454807/gabukok.pdf
    • http://pugixux.elkioskoboots.com/uploads/1/3/1/6/131637223/9327917.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/694d5d_a0b9999ec1764f1680eee9d65a5b6655.pdf
    • https://static.usrfiles.com/ugd/516793_df1042ff742f4de29a7bc4013b8eb624.pdf
    • https://static.usrfiles.com/ugd/c1de29_d4d174569d304cfa9e276fd7e3f0fac3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3849cf880a9d411e869eb4303ccdca74.pdf
    • https://static.usrfiles.com/ugd/963627_7046a09be0694aa6b332267eb90eb861.pdf
    • https://cdn.shopify.com/s/files/1/0438/6314/6656/files/4659978451.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/82629420553.pdf
    • https://static.usrfiles.com/ugd/e3834b_384ba887bf2a4635870ba78c89590835.pdf
    • https://static.usrfiles.com/ugd/804ff6_711c1573c9dc4e839d30e0a17eae3306.pdf
    • https://static.usrfiles.com/ugd/353d00_5f195bf6cb0d44fa93b870f275abe42e.pdf
    • https://static.usrfiles.com/ugd/3283b0_e0fb3940d10f422cbee3af6a066e5207.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c3a.bin
f3ed52e43977dfeec252a9c42cd1b0c94c24e07a18283eabe43d1b959c9d4c4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3A 5560 bytes
font_01_sfnt_off00009f2d.bin
ea9fa659dda9ee79ab5bf4ab3c478ab79c61597b3add5b0c2bb6dc1ea38591c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2D 13124 bytes

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