Malicious PDF — malware analysis report

Static analysis result for SHA-256 109645a18a812c90…

MALICIOUS

PDF

54.6 KB Created: 2020-12-21 23:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dabc8ca55f551a21747598f8548ccd30 SHA-1: 8e93c9a3d22ebb2ba62c7a591698c381c742c4ad SHA-256: 109645a18a812c907accb6ad7b7d33322ccab9d610054e1b9ea6212b661b7d8f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://cctraff.ru/aws?utm_term=cambridge+guided+bus+timetable+trumpington'. ML classification and ClamAV also flagged the file as malicious. The document body, though heavily obfuscated, appears to contain metadata related to a timetable, suggesting a lure for the user to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8235

Heuristics 3

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?utm_term=cambridge+guided+bus+timetable+trumpington
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5fd89b610c424.pdf
    • https://cdn-cms.f-static.net/uploads/4471092/normal_5fd28ae8cc6a0.pdf
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5fda75d29120f.pdf
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5fd7c2fab9d5d.pdf
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5fd7f5857794c.pdf
    • https://tewazaxapij.weebly.com/uploads/1/3/4/8/134873756/wifiruxokejaparevaj.pdf
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5f998815291ea.pdf
    • https://xelefivaj.weebly.com/uploads/1/3/4/2/134234850/96640c4db9ff.pdf
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/zikojeg-kebutasiv.pdf
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/76f50a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/768c5b2e-8a8a-4347-b917-e7f3cafe929f/24039894368.pdf
    • https://static1.squarespace.com/static/5fdd5508eb685147a09c9c9e/t/5fde3aeda478394ebc9a4c4a/1608399600248/zeraremavutib.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b29a.bin
6cb81fa8c282186b35e959e7bca598a0e6997c641563a41f0e24a3f21eca7ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB29A 5324 bytes

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