Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af49635b9d8223e…

MALICIOUS

PDF

61.5 KB Created: 2020-12-17 10:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8049f581801984958491d9962c844c94 SHA-1: 1d32be71b58fcfdb139ade0d1710b56a1b97a677 SHA-256: 9af49635b9d8223e66f66a1c5b04decfaaea7c50f28a8020f527d7b7dd7d1195
182 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is a strong indicator of phishing or malware distribution. The ML classifier also flagged this PDF with high confidence. While the document body is heavily obfuscated, the presence of a malicious URL and the ML detection strongly suggest a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/strik?utm_term=umass+d+login
    • https://cdn-cms.f-static.net/uploads/4459929/normal_5fb39a95d1724.pdf
    • https://cdn-cms.f-static.net/uploads/4392651/normal_5fc10cae7aff8.pdf
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5fa4c1d4f370a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bcf9b0f9-4ac9-4840-a38c-9a4902a32bea/70280573282.pdf
    • https://uploads.strikinglycdn.com/files/a5844542-12a4-4494-badb-77284a9ecb55/hinduism_for_dummies.pdf
    • https://uploads.strikinglycdn.com/files/fc67ceb5-ac55-438a-9c81-3b907fd853a7/wow_classic_priest_talents_holy.pdf
    • https://uploads.strikinglycdn.com/files/8cc51bb0-61f5-43d9-9730-002473a364dd/42158236577.pdf
    • https://s3.amazonaws.com/jarirotexab/43410462567.pdf
    • https://uploads.strikinglycdn.com/files/46ed5b08-6b32-45bd-ba9f-b790493a95b2/astigmatism_test_chart.pdf
    • https://uploads.strikinglycdn.com/files/21b080ea-ef8b-41cb-9e62-1870e2a6c0b1/nugoliwudananab.pdf
    • https://uploads.strikinglycdn.com/files/eb0e193b-61ad-4792-9897-56a225702d69/wimekorinakaxe.pdf
    • https://s3.amazonaws.com/jebokizez/blackout_bingo_games_online_free.pdf
    • https://uploads.strikinglycdn.com/files/05efec4d-c446-476e-8538-3eaeee794419/11186821723.pdf
    • https://uploads.strikinglycdn.com/files/f2f03c07-6393-4185-baa1-064c5400b697/braverman_labor_and_monopoly_capital_summary.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_off0000b37a.bin
d95e604119d4ef15c567b28f88d6b0ec2e2c200c49abc4d34689cb181ac88829		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB37A 5040 bytes
font_01_sfnt_off0000c489.bin
2805a0e6d2d61d65f7cdad98d4e1d1099e0c21c7cb0b201eb80ed56d057e16bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC489 11140 bytes

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