Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccf4aa10ef4f754…

MALICIOUS

PDF

569.5 KB Created: 2021-01-09 19:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d216fa16b488d150272aad263e9a6eba SHA-1: f98f5b5976b08319d02010055474803e1e734d59 SHA-256: cccf4aa10ef4f754dcfaf2677b1fd1ba5b03d03476f0a42680ba4b7db3290937
114 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, and heuristic analysis indicates it's a callback phishing lure. The document body, though heavily corrupted, suggests a fake 'annual report' intended to deceive the user. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9234

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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=manufacturers+and+traders+trust+company+annual+report In PDF document text
    • https://cdn.sqhk.co/fujalapevame/diglijS/tangled_songs_lyrics_healing_incantation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_5fd3104fbb4e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368479/normal_5ff279bf812ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488822/normal_5feb6da5a287d.pdfIn PDF document text
    • https://site-1174658.mozfiles.com/files/1174658/99057706421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475582/normal_5fdd8996d4c8c.pdfIn PDF document text
    • https://site-1166601.mozfiles.com/files/1166601/wee_werewolf_toddler_costume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_5fba3065b8dd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fcda106abe34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427079/normal_5f9a4b2d2d440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/ibps_guide_rrb_clerk_free_mock_test.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/jamun_juice_benefits.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/32796212157.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/ontario_auditor_general_report_2018_tssa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00089914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89914 5408 bytes
SHA-256: 685f30d44a533d1a8e3887eaedd196596c98f7730463ca90431468c5a1a7a307
font_01_sfnt_off0008ab7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB7D 13024 bytes
SHA-256: a898e808a9c65c8a898e28e08a9e6a6a39a4f2181317bcf00a9bcdffd83046da

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