Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45f916325149118…

MALICIOUS

PDF

71.3 KB Created: 2020-12-31 07:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 42592ff7f998eee12559959e69e4de48 SHA-1: 73b0b0c45c9b5ad4c704c3c2d5d4e6c197d63eb4 SHA-256: b45f916325149118c1ca8b87fc1b9ee278a824f1403e5817ad473f51dde325e2
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=stickbow+archery+leatherwall'. ML classification and ClamAV also flagged the file as malicious. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/strik?utm_term=stickbow+archery+leatherwall In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f90b44677c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_5fa5929eb7e75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fbb0fcf1a0e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465709/normal_5fe25c9d7ba0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5fb759911a2cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f991ecc7c412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_5faee2f218855.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/36a5221b-2797-4758-95f9-5de3276ee7b9/slither.io_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/pilolibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c820e8e-c81e-4973-8ffd-1d7d2f933b02/black_night_shirts_for_women.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ea4416-cf9e-4643-ac0a-40dcac85106f/86221987972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628331cb-16e1-488c-ba5c-e28b8107b774/94511129622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ac289b-417f-410d-8d4c-206093449f3e/serum.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_off0000da7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 5208 bytes
SHA-256: 227a2190ea544b0129e4ad6c27bff610f45dc1b4f33429a4a020468038d88186
font_01_sfnt_off0000ec4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 10688 bytes
SHA-256: ab0b68451fee07a87090752f4b34c1dbc9b3375c8ebfc2b93f46c47f70c58f49

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