Malicious PDF — malware analysis report

Static analysis result for SHA-256 12849b847ec2f589…

MALICIOUS

PDF

60.9 KB Created: 2020-11-22 10:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10aaf3bd6c3a8a6948a6dc37bcf49fb9 SHA-1: 1f216f0015d7b7ad04dab5ddff018349a24db6c5 SHA-256: 12849b847ec2f589e5deaf049754cf4d49a1f777ec5423ce0909c58d2dc3c06f
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 'traffmen.ru'. The ML classifier also strongly flagged the PDF as malicious. Although no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests a phishing or malware delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=taylor+learning+center+snellville+ga
    • https://cdn-cms.f-static.net/uploads/4485929/normal_5fb4f1e6cef5f.pdf
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f8f37bdd4627.pdf
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f8a0fd751228.pdf
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5f9a523033202.pdf
    • https://cdn-cms.f-static.net/uploads/4445754/normal_5fb3e818e5686.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/46c402fb-a1a1-4059-8058-dc5676967c60/table_topics_toastmasters_ideas.pdf
    • https://s3.amazonaws.com/dabatisew/54675753239.pdf
    • https://uploads.strikinglycdn.com/files/d8c068da-1a11-4955-aaaa-2c2e25e9c528/ropixewolofegojadapa.pdf
    • https://s3.amazonaws.com/bugutaj/dagogubonim.pdf
    • https://s3.amazonaws.com/figugipopar/microsoft_teams_background_custom.pdf
    • https://uploads.strikinglycdn.com/files/f422b805-12ba-493b-8dbb-f7449fe8df59/mugomuvuguw.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_off0000b25c.bin
e464b0fec1296d29ba3287840741f94388ade01bbb9a9248c687d7f699064cf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB25C 5080 bytes
font_01_sfnt_off0000c3cb.bin
c83a745b0aa5f86c1c55377615b9d068c914a500ddd35c32ab219e6c529d451d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CB 10388 bytes

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