Malicious PDF — malware analysis report

Static analysis result for SHA-256 c749f8dab3152968…

MALICIOUS

PDF

78.7 KB Created: 2020-11-18 01:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2243fe2ccabd0c7ff7e2785d89b90ec8 SHA-1: 4428aac34f1522d3ad1cb6300abd31ec38a62776 SHA-256: c749f8dab3152968516841d3e9f04b8940385f44d9e22cf5b22705730f4dcdbd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/123?utm_term=tri+tip+crock+pot+cook+time In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5fadac02192eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fa1ca4215538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5f9723b406efc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491936/normal_5faa6762b0f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5fa0b352131b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5faed23b4ed5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_5fa685a814ff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5f9ee94bb5bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fa8b91eb9070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f9459c94c2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5faa0e1610dc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e7ac3514-8580-4727-8a26-eeeeaa0947f4/fopekali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd897da4-90c6-40ed-93c1-ec680e7a98c7/bofunokovasoravekezadan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454b0003-80ab-43b5-8b48-7fafd9872b05/royal_envoy_walkthrough_level_52.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c733d072-cce9-4821-a560-aa25e1d372d3/85101521626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1999eec5-db1b-47b6-96b8-663ddb8ae4f4/88123712381.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 4356 bytes
SHA-256: 1f26f4e22805d0bddfaa3d1ac6a0b8a2f57c2598fdebb765c911149d11ee14c9
font_01_sfnt_off0000fc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 10240 bytes
SHA-256: 697b50c91785e9d881140b9e738d3df0ea61f449a08daba201b02ed2538f8e21
font_02_sfnt_off00011f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F93 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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