Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aee22c2969f5c2b…

MALICIOUS

PDF

67.1 KB Created: 2020-12-21 16:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a50dd8a83528fd859c65189dbe44718d SHA-1: ef7a15747d3b756460e76f898f0d22e5af21f6bb SHA-256: 2aee22c2969f5c2b8ead32eb1d6d0e9946b70a0ef9ee7933fca76dcbd51581e6
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'traffine.ru', which is likely used to redirect users to further malicious content. The file also exhibits characteristics of a link farm, aiming to obscure the true destination and potentially distribute malware or conduct phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=titanium+valve+springs+4g63 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404296/normal_5fb004c22a3b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5f9e188debb39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_5fa9d34b577d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f8a175f20544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410214/normal_5fa556532d039.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/6969617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_5faa653b7e94c.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/8591716.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc73b265-9092-4475-a35e-1eceb907a505/zazerirevepax.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52053c6ccf69f3551823/1606373894417/wunisozoxanogusetebediva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd45c3eb685147a09c264a/t/5fde6d06f11f517dbbc43171/1608412423685/horde_leveling_guide_joana.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfff689955c744b536924c/t/5fd0e9d6ddb76c6e666b1962/1607526875150/action_truck_parts_bolingbrook_il.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC318 5552 bytes
SHA-256: 2359c5cfee56ece8b342beedf61d9d3415c0285d4e4ece7e7d405fceae334c01
font_01_sfnt_off0000d5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F5 12648 bytes
SHA-256: a33edea69df7380313b3d6d642a56bd7115728e51ffa487c0a100008dcb4042d

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