Malicious PDF — malware analysis report

Static analysis result for SHA-256 480294b4a6ef2857…

MALICIOUS

PDF

69.4 KB Created: 2020-12-28 21:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 68e7da9cb00b82412007639254ffe913 SHA-1: 6bddcab18c167bcb5fbe13e56df559027ab76d50 SHA-256: 480294b4a6ef2857ec1af8e0640833aef93723c58f87571a048c9aeeb9764672
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 'ggtraff.ru'. The document body, though heavily obfuscated, contains text related to 'Tor browser download for kali linux github', suggesting a phishing or social engineering lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?utm_term=tor+browser+download+for+kali+linux+github In PDF document text
    • https://cdn.sqhk.co/fifapupifig/Zl0rhhg/civil_war_ducks_vs_beavers_tickets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5fad862a19272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_5f9c9c2812849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f892d2d471ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fe79aac5e3ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487903/normal_5fbb436a0b1fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pukiza/52826710964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca8f07f-495c-41ac-af20-2727d23ee79e/70749931365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87a284f-5b4f-43ca-9729-4914238d8479/business_intelligence_analyst_skill_set.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/baby_trend_double_jogging_stroller_front_wheel.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/33245851388.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_off0000d020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD020 5484 bytes
SHA-256: 2cc509d6b7c9fb2e5033a3eed0a859ae7be72096d48fb61fc96ecd69e47fbb9a
font_01_sfnt_off0000e2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D5 11164 bytes
SHA-256: 7ab069e5c305e83717a3c8ae39c69580b2b687837a36dec38d841a4d34b7e2d6