Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f8e29951f24c97…

MALICIOUS

PDF

64.5 KB Created: 2020-12-25 07:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edf99a6c1b5371ab7312071601e9082d SHA-1: d7bf2dba1a5383cdbada90205516ab34b312627a SHA-256: d6f8e29951f24c976140573b626704189ea729b02fdea79f4d3ebe3a54db8a01
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 'traffmen.ru'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised or malicious site, likely for phishing or further 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=the+periodic+law+puzzle+answers
    • https://cdn.sqhk.co/lanasido/ieihgcW/lebemowoseduk.pdf
    • https://cdn.sqhk.co/nerenina/gighaXZ/wheel_of_fortune_video_games.pdf
    • https://cdn.sqhk.co/jesisuvov/esZidwc/18495026732.pdf
    • https://cdn.sqhk.co/purovufizu/VhgOjby/nadavegatuwusopafapajupog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a6e3dfbd-3e69-46a7-9121-1229bb2efee3/ray_of_clumsiness.pdf
    • https://uploads.strikinglycdn.com/files/d552cc4f-67d8-4194-b507-bd19ef4bfb45/spuds_mackenzie_dog_breed.pdf
    • https://uploads.strikinglycdn.com/files/f267743a-3d8e-4217-94ed-62d9a197313c/bapujamiwebesiref.pdf
    • https://uploads.strikinglycdn.com/files/6d0bf4f1-b4a4-4e0a-8247-1cd4ea3e4722/98939282593.pdf
    • https://uploads.strikinglycdn.com/files/06eb9b6f-1c00-4a15-87aa-cd000fb94093/favozufilepowavopir.pdf
    • https://uploads.strikinglycdn.com/files/5daf264f-9026-442a-a9b6-ed59776b4df7/44839398324.pdf
    • https://uploads.strikinglycdn.com/files/3ab53fdb-7009-4450-9852-acbce46f2a80/hans_urs_von_balthasar.pdf
    • https://uploads.strikinglycdn.com/files/75805d5f-2bf5-4a1d-8a7c-eef7988c92a2/97818798263.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_off0000c0e6.bin
ac783ba76b99881c43707bfc2c56d278778e57d5d1a296e4e2a9964796ae8963
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E6 5252 bytes
font_01_sfnt_off0000d2d1.bin
8764935bf1f08fd0a3fa489f60aa02a2e45baca98a31e3b91799f63c3053357f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 10068 bytes