Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0189bf8646b2232…

MALICIOUS

PDF

65.9 KB Created: 2020-12-24 23:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 265c29e3bc28a6b0536c928eaa5442a4 SHA-1: 69c76c2eba7a1c75b1a0cf55ac13286387972578 SHA-256: d0189bf8646b22326bb2521f183a906229b1fd698165f1a3333ecef3d22ea66a
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 'https://cctraff.ru/123?utm_term=safariland+drop+leg+holster+platform'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were explicitly extracted, the nature of the redirector suggests the PDF's primary purpose is to lure users to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=safariland+drop+leg+holster+platform
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5f9d86d5c392b.pdf
    • https://static.s123-cdn-static.com/uploads/4408858/normal_5fc5735be3163.pdf
    • https://cdn-cms.f-static.net/uploads/4450248/normal_5fb5e97c9a966.pdf
    • https://cdn-cms.f-static.net/uploads/4454167/normal_5faa70c6ada3c.pdf
    • https://cdn.sqhk.co/soxemudu/cDiiijf/36825942176.pdf
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8744592ee32.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/80500775-b595-403a-a85b-d1d5184f3a8d/22840569051.pdf
    • https://uploads.strikinglycdn.com/files/af5284f9-f0b0-46e0-9a70-fcc0c96797cf/76391007021.pdf
    • https://uploads.strikinglycdn.com/files/16b40cf8-ceff-4d98-abac-fe247266ea63/zoziziruditozaxawatop.pdf
    • https://s3.amazonaws.com/jofunozuzof/funny_brain_teasers_with_answers.pdf
    • https://s3.amazonaws.com/ribowexulo/elf_goodbye_letter_printable_free.pdf
    • https://uploads.strikinglycdn.com/files/e158b00a-7447-4d0f-acba-9faee528b5bc/lafikudakofev.pdf
    • https://uploads.strikinglycdn.com/files/939cf2ea-8e28-4839-9964-f2b75ec29eee/brother_super_g3_fax_machine_manual.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_off0000c454.bin
a93457a0f360779a4f59b9b1343b1f9fdf227c20178502694c64e7e2081bede9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC454 5560 bytes
font_01_sfnt_off0000d714.bin
3aebf1d4580c6ebffd53ff16a4b0e201ff06bd962798e22b8bf0b67f14c1de8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD714 10604 bytes