Malicious PDF — malware analysis report

Static analysis result for SHA-256 705774f755e7baf9…

MALICIOUS

PDF

58.6 KB Created: 2020-11-09 22:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5028e2733ebf51619181462ec90efa0 SHA-1: 3125ec26a8bb60441c995e91f45b075347aa0b05 SHA-256: 705774f755e7baf9e692f509893bc8085269052550c82e1a3d2155d742ec63ce
212 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external PDF links, including one pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://cctraff.ru/aws?keyword=epic+games+launcher+apk+pc, which is likely intended to deliver a payload. The presence of multiple PDF links and the ML classifier flagging suggest a coordinated effort to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7342

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.
  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?keyword=epic+games+launcher+apk+pc
    • https://refaxezadale.weebly.com/uploads/1/3/4/3/134325555/sidoxi.pdf
    • https://morizuni.weebly.com/uploads/1/3/4/6/134606759/furikodebezabelibug.pdf
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/8252373.pdf
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/nelukefevunug_zofemamajewime.pdf
    • https://fegibaja.weebly.com/uploads/1/3/4/3/134305779/7314682.pdf
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8e85013d1b7.pdf
    • https://cdn-cms.f-static.net/uploads/4462351/normal_5fa850ff1c82d.pdf
    • https://cdn-cms.f-static.net/uploads/4421213/normal_5f96f0b448d26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/felasorarabipis/nigefem.pdf
    • https://s3.amazonaws.com/luxelula/64002216834.pdf
    • https://uploads.strikinglycdn.com/files/837c5e72-4f6a-4665-8b47-95c47dd4f81c/84908089764.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c295.bin
07b8ec8addc0e650c10e61b7d4fdc47f7dd356286e1499cd4965f114c27017b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC295 5368 bytes

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