Malicious PDF — malware analysis report

Static analysis result for SHA-256 2deb6eb686500b56…

MALICIOUS

PDF

34.7 KB Created: 2020-11-02 03:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 262273cd63be30260f643f1206181f6b SHA-1: 4034f4b346c79f9c458f68e42f856c8b02639093 SHA-256: 2deb6eb686500b561b33a3f2882c2cf64a4d7c2bc4812b4e60a22f6c95f0869c
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://cctraff.ru/aws?keyword=fancy+pants+adventure+2+unblocked+games+6969', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for game-related content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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://cctraff.ru/aws?keyword=fancy+pants+adventure+2+unblocked+games+6969
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8b2ee3ef09e.pdf
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8776b5822f3.pdf
    • https://cdn-cms.f-static.net/uploads/4419424/normal_5f98f343ae07a.pdf
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f89db28036c7.pdf
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/e1667a87f71a7.pdf
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/jodetebanud.pdf
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5f92c22e53ab6.pdf
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5f8ede9ae01ff.pdf
    • https://cdn-cms.f-static.net/uploads/4407571/normal_5f96d50563f50.pdf
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f8abcb12c2d5.pdf
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f8b759f38ed8.pdf
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5f8de398f086d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/gimejajabamu.pdf
    • https://s3.amazonaws.com/fasanag/maharashtra_board_11th_biology_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0496/5217/0908/files/quantitative_research_study.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000721c.bin
191f35bfc6d2cf9172ce53b2b2760c48464d0cdbb162c75fd2f5ec13031d2ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721C 6156 bytes

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