Malicious PDF — malware analysis report

Static analysis result for SHA-256 e282e8f9e5669da9…

MALICIOUS

PDF

65.8 KB Created: 2020-11-10 11:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54cc2cb7e2bf71e9c54fb44934ec4b8e SHA-1: 5c122e802248136b8451d945eb66cd013067be52 SHA-256: e282e8f9e5669da9180ef89ab19fc7ffc157ff9a3c5e769b1c9ecbde21e90187
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://trafffi.ru/aws?keyword=compton+police+shooting+today', is likely used to direct users to malicious content or further phishing attempts. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=compton+police+shooting+today
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f97af4710740.pdf
    • https://cdn-cms.f-static.net/uploads/4412160/normal_5fa9d5bd49e62.pdf
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f8ffd9ff3d7e.pdf
    • https://jopizogado.weebly.com/uploads/1/3/4/3/134317888/roxesefatef_jitijixawudani_vesunisosaxazu_fupikeforenox.pdf
    • https://cdn-cms.f-static.net/uploads/4392661/normal_5f9e11c8823df.pdf
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/parififuwezape.pdf
    • https://jirixakevafu.weebly.com/uploads/1/3/4/4/134404576/1245239.pdf
    • https://pamesatigifimes.weebly.com/uploads/1/3/4/6/134639420/f2a8a.pdf
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/ec566b2b3.pdf
    • https://cdn-cms.f-static.net/uploads/4380070/normal_5fa3ed9438db3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8b6f60a0-b3f8-410f-9076-13928cab7b11/bejobegojurixe.pdf
    • https://uploads.strikinglycdn.com/files/62dc278b-cbeb-4eb8-ab24-636556b6b777/kigunedaju.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_off0000c4fc.bin
2e5aec221ac85a23a7a597dfc02dd89dd7a2870b53fec1145d4b6f33d8ff0453
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FC 5396 bytes
font_01_sfnt_off0000d737.bin
746ac162d0259743b815f7aca243294d4170c8fa0af600a1446e47ce3f9b7bd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD737 10364 bytes