Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9fc6d9bc485de56…

MALICIOUS

PDF

60.8 KB Created: 2020-11-26 16:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56e6fcb123b2a730b353d0730543e631 SHA-1: 7b8140fffc3efbbe9b0ead3039022f01e55a2889 SHA-256: f9fc6d9bc485de568426c56b2b600c82e4f1be464b0d74cb1d9140bf9c7bc284
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=the+sword+of+doom+trailer'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates a phishing or malware distribution attempt. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=the+sword+of+doom+trailer
    • https://cdn-cms.f-static.net/uploads/4402722/normal_5fb27cb8d2b22.pdf
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5fa4c6c2332f4.pdf
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f9bcd32ce764.pdf
    • https://cdn-cms.f-static.net/uploads/4419191/normal_5f9812a0d1c0b.pdf
    • https://cdn-cms.f-static.net/uploads/4487903/normal_5fb494f737a88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jexijer/lagu_its_you_cover.pdf
    • https://s3.amazonaws.com/takateg/tendinitis_aquiliana.pdf
    • https://s3.amazonaws.com/dedinavesute/wulurejenako.pdf
    • https://s3.amazonaws.com/musoxifuvitalo/gakaguviluwijusufuzatanu.pdf
    • https://uploads.strikinglycdn.com/files/396eedf2-9a42-45cc-a629-82574fcd1a50/66526869832.pdf
    • https://s3.amazonaws.com/jotizifime/segotudadipikarusapo.pdf
    • https://s3.amazonaws.com/ganubatebedoxez/youmap_cast_receiver_apk.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_off0000adfd.bin
f59908dc52161fa8aa78906072e2aa802228132d9717a76c8238a566e79fb8a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADFD 5188 bytes
font_01_sfnt_off0000bf85.bin
b3cf1486a5c153171b6e07c5a8db3a87875bfd70cb4496d0d78a3c2ee9e7f5df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF85 10936 bytes

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