Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f590ac469399f2…

MALICIOUS

PDF

66.1 KB Created: 2020-11-20 23:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16dae1a8cc716e4620153904b274d73a SHA-1: d4524b9a60425491ff1cdd7f02b848d8d9f712f4 SHA-256: f0f590ac469399f25cc9dead0ccec874e756f43d06e7bbad6473a0c14f606ab1
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=different+types+of+woodpeckers+in+colorado'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/123?utm_term=different+types+of+woodpeckers+in+colorado
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5f9e3777c2624.pdf
    • https://cdn-cms.f-static.net/uploads/4403679/normal_5fa89bba11086.pdf
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5fa395ecd405f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jijumupade/11461301230.pdf
    • https://s3.amazonaws.com/zafaronivaj/exercice_amplificateur_oprationnel_corrig.pdf
    • https://uploads.strikinglycdn.com/files/022348e5-2b43-4cfe-89c2-b4d0faa9da11/wedizavoz.pdf
    • https://uploads.strikinglycdn.com/files/20199f64-9448-468c-a868-5a4eb8de84b2/8398052815.pdf
    • https://s3.amazonaws.com/rawesaragegugar/jebidugomivirufag.pdf
    • https://s3.amazonaws.com/leguvefu/62958750637.pdf
    • https://uploads.strikinglycdn.com/files/5df055a9-4a83-4443-a27c-3f6f2026cb61/zosisarataf.pdf
    • https://uploads.strikinglycdn.com/files/72dfbf78-e2e1-4cb0-8af6-c050738de893/61262619289.pdf
    • https://uploads.strikinglycdn.com/files/5039c64d-aa26-4b5c-8ce1-a68d4e0d480f/dolabesujal.pdf
    • https://uploads.strikinglycdn.com/files/3524c9c4-c603-4bf9-86e0-1f84172a18cb/49493053507.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_off0000c5c2.bin
4873d1932e2ea5e10ae3a243531fdc01dffdd79a7c5bea89f02e37faff6cd75a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C2 5404 bytes
font_01_sfnt_off0000d85c.bin
7d4469568a9a1f0330e9b8c44a4d234a946a21a7c821a603ee3a02a0fb965f51
pdf-font-stream PDF embedded font (sfnt) at offset 0xD85C 10464 bytes