Malicious PDF — malware analysis report

Static analysis result for SHA-256 b267742a249e3255…

MALICIOUS

PDF

39.9 KB Created: 2020-09-13 16:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ade91a8745ade6780422c87903882a53 SHA-1: 76f98751e20469949f528bd35778b2c5a2b64c6c SHA-256: b267742a249e32555963a3ee6820fb07f4d1d28d43d612c2a8c607a90737c062
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly innocuous links. No scripts were extracted, but the PDF structure itself is used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.me/wix?keyword=recycle+number+6+meaning
    • http://files.creativetrivetstoo.com/uploads/1/3/0/9/130968949/296042ee12.pdf
    • http://files.cupe2026.ca/uploads/1/3/0/8/130815213/gidamuzu_wajuwabarir_siraxu_ziwuveso.pdf
    • http://files.johnathonqswanson.com/uploads/1/3/2/3/132303378/958467.pdf
    • http://files.spineacademypt.com/uploads/1/3/1/4/131455543/telomivojadojilenoju.pdf
    • http://kuxus.basilioalonzofamily.org/uploads/1/3/2/6/132696128/ruvam-giretutaxunupaf-xidafimubovos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2050/1660/files/buyers_edge_platform_summit.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/no_answer_in_french_language.pdf
    • https://cdn.shopify.com/s/files/1/0432/0552/5661/files/40969606732.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9064/files/dutekigep.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d8b.bin
ec330847058c08d51d4798cd10f986dd48879c9fe2aab4f9aba0c37d8ddecde7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8B 5344 bytes
font_01_sfnt_off00006fb3.bin
4aee2287f8e367808e3e8e58eb262fbea8c30695179dd6f1b9da3f776dabeb3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB3 10528 bytes

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