Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cbabf120b6eff1…

MALICIOUS

PDF

66.3 KB Created: 2020-12-21 16:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eb90ef0fb074c16a0ee2c56e841707e7 SHA-1: df518f8e14cbe211b31da54e7747982010b42037 SHA-256: 80cbabf120b6eff14f9ede50908545f85b8244f7852387a729c2e6f72fe0484d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://cctraff.ru/strik?utm_term=shogun+japanese+grill+sushi+bar+katy', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/strik?utm_term=shogun+japanese+grill+sushi+bar+katy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f952f2bf0f06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422180/normal_5fa94ade89a93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384296/normal_5fce763c55a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409254/normal_5faf282d205ef.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/julexekubaj/21529051315.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eaf5c89e1c4b8fbe7403/t/5fd1b62dad61ab5831894f97/1607579182633/free_slots_with_bonus_no_deposit.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/15955064948.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/acetylated_starch.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/nikola_tesla_autobiography_my_inventions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9f1e8b13fe0be8181d02/t/5fdd1220c13d852dbe0fa774/1608323617938/gokajozasox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e0e8ec-011b-4b86-b0fc-181b5070189c/definition_supporting_details.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830f0033-6d80-4eb0-aa22-3ddc0006f3ae/lovowupubapime.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd021279c08c7f2b9f995e/1606222355074/62975961940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e960969-34e6-4eca-853c-68c259653780/vopuve.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_off0000c706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC706 5564 bytes
SHA-256: 4c983b0227ff0b181a1c3ccfff9d3dec300f9a317e73fc4bca44527e677d4112
font_01_sfnt_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 10192 bytes
SHA-256: afa9083cc42eb9c3f95966623b927d644e66264e7cf35dfa05395fde98eed546

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