Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbffbadbcb492ce1…

MALICIOUS

PDF

73.6 KB Created: 2021-01-05 20:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 405cd74baa97c0eea228137d794b4bab SHA-1: 7fc3a5a3d479d5708b17e399c7afcbf51afdaa1c SHA-256: bbffbadbcb492ce1c524b1fa0279a679f050e8711a21e6464f667806e56421e5
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://traffmen.ru/aws?utm_term=antonin+artaud+jet+of+blood+pdf'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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://traffmen.ru/aws?utm_term=antonin+artaud+jet+of+blood+pdf
    • https://cdn-cms.f-static.net/uploads/4481272/normal_5fd7284d19aa1.pdf
    • https://cdn-cms.f-static.net/uploads/4452595/normal_5fb772b1c915c.pdf
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5f9bf363a4cd7.pdf
    • https://cdn.sqhk.co/dodagirojep/Ygugfvo/dafakan.pdf
    • https://cdn-cms.f-static.net/uploads/4453902/normal_5fb671209929e.pdf
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5ff44ad02d68b.pdf
    • https://cdn-cms.f-static.net/uploads/4446280/normal_5fdafc45bbccf.pdf
    • https://static.s123-cdn-static.com/uploads/4493881/normal_5fc95fa2572f7.pdf
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f95ff4eaa219.pdf
    • https://cdn.sqhk.co/dolubivo/W2hrajE/44430754893.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/luropi/46438464583.pdf
    • https://uploads.strikinglycdn.com/files/2409ebff-2214-4d97-87a7-4f684ac1b1c4/86567484241.pdf
    • https://s3.amazonaws.com/sizabo/pifajejijirelaroduvaf.pdf
    • https://s3.amazonaws.com/zakunafu/tejutalovarepodefajemogep.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_off0000e3f0.bin
769a2d75547a28a5e054090b018ecedb2721954659bedbf1adc0e6597c7841d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 5064 bytes
font_01_sfnt_off0000f539.bin
e2628a9f35b47db0a4ea0a8605dccbfeda62d943bb9b4a986eb91ec9db86f27c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 10700 bytes