Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea60dce86fbfbcd…

MALICIOUS

PDF

48.0 KB Created: 2020-12-16 23:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c9c70b1b9fa0ec42ffc63e3a0dfc959 SHA-1: 489e8a4ddd0dae0244db4d5314c4ff542b235dec SHA-256: 8ea60dce86fbfbcd99baf6cf88993ab5e0352590a5007cf8855a148c0fc3dabf
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URLs, particularly the one pointing to 'cctraff.ru', are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9335

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=angle+of+elevation+worksheet
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5fbc7276407bf.pdf
    • https://cdn-cms.f-static.net/uploads/4488329/normal_5fab0040d6459.pdf
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5fd1bdc83689f.pdf
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/ef504e306e05061.pdf
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/1e58b30.pdf
    • https://static.s123-cdn-static.com/uploads/4413976/normal_5fd08d2191189.pdf
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/pamituwogijo_sugakozirigene_dibalesituvus_fozoko.pdf
    • https://naxaludegefow.weebly.com/uploads/1/3/4/7/134776308/88349a10.pdf
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f8f0052220cd.pdf
    • https://uploads.strikinglycdn.com/files/5e98cd4a-285b-4a35-b0c9-0b2932259a2b/kasev.pdf
    • https://uploads.strikinglycdn.com/files/29ac92e2-997a-449f-ab62-1f2a5bf86331/41354114313.pdf
    • https://uploads.strikinglycdn.com/files/f6db6383-7040-4765-ab5b-6ffdd064d564/94895639057.pdf
    • https://s3.amazonaws.com/zunewidimem/binopevukuzof.pdf
    • https://uploads.strikinglycdn.com/files/c59e65ee-56b8-4497-b07f-b678e94acebd/67246033841.pdf

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