Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfb8a915efa2682…

MALICIOUS

PDF

71.4 KB Created: 2021-01-02 03:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74516a2dafafaf6fb50200dbb70d8442 SHA-1: 52c53f3f891cc8ce73dd58afa509b970185f7fef SHA-256: ccfb8a915efa26825b3416a88455c6766aed485df290954f29b9f16e45f90cd7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL, https://traffmen.ru/123?utm_term=babyliss+pro+nano+titanium+curling+iron+1.5, is the primary indicator of a phishing or credential harvesting attempt. No scripts were extracted, but the PDF structure and URL strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=babyliss+pro+nano+titanium+curling+iron+1.5
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f8fe780a9f94.pdf
    • https://static.s123-cdn-static.com/uploads/4416495/normal_5fc3dd3e4f90f.pdf
    • https://cdn-cms.f-static.net/uploads/4481852/normal_5fd1282d4b87f.pdf
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f98f8e150a0b.pdf
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5fa0467898e1f.pdf
    • https://static.s123-cdn-static.com/uploads/4454426/normal_5fcf2b696713c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/485be034-c824-4dfd-be4d-028e98c2ea21/nomurazobafawolesu.pdf
    • https://s3.amazonaws.com/jamokaroxoj/gakilazu.pdf
    • https://uploads.strikinglycdn.com/files/4eb6a398-d0da-4058-8b73-ca25b61b70a0/jotoxe.pdf
    • https://uploads.strikinglycdn.com/files/c6c62fd7-0efe-4778-9c23-43a6b4f98b14/12890788115.pdf
    • https://uploads.strikinglycdn.com/files/b34e07af-2006-4513-815f-279555baa14c/calla_lily_care_indoors_drooping.pdf
    • https://uploads.strikinglycdn.com/files/9ba71fec-c6e1-48e1-af38-0283eef768a3/franchise_hockey_manager_2020.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_off0000d67b.bin
aa1f6eef522b435665bf64037cd65bb9d21e6b0369851c19db14c6af36956172
pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 5752 bytes
font_01_sfnt_off0000ea13.bin
b9f491090213e5bfca9c4d330333cf55f63c11467b925a36e48c464db35b8273
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 11276 bytes