Malicious PDF — malware analysis report

Static analysis result for SHA-256 44dec706b5d8124a…

MALICIOUS

PDF

64.5 KB Created: 2020-12-07 08:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55ce79cf52b869df2470a5060f734800 SHA-1: d55f2fd90b841fe1520718dae94ec5901e182bf9 SHA-256: 44dec706b5d8124a8d4b4ab3b30f48f71787a74d668b322058ba9f60069ee482
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 flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to redirect the user to a potentially harmful site, consistent with 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://traffmen.ru/strik?utm_term=leon+blanco+precio
    • https://cdn-cms.f-static.net/uploads/4459034/normal_5fab979947c0f.pdf
    • https://cdn-cms.f-static.net/uploads/4443326/normal_5faa7135abcf9.pdf
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5f908ddbe0413.pdf
    • https://cdn-cms.f-static.net/uploads/4486997/normal_5fc33d4d6087b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf0ad254-d028-4f0d-bf97-1989fb3e7a46/101_ejercicios_para_aprender_a_puntu.pdf
    • https://uploads.strikinglycdn.com/files/ecf33e66-bb4f-432f-851d-9421522614f5/zipena.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe6bc63c02f22b9ddedc24/1606314950509/stumbling_on_happiness_summary.pdf
    • https://uploads.strikinglycdn.com/files/7904df62-3dcd-4a95-a2a2-06e6a654c61b/4313122283.pdf
    • https://uploads.strikinglycdn.com/files/473f05df-dde2-4a6a-a5a3-b7d7f9e86a77/lodetosabamisamulolok.pdf
    • https://static1.squarespace.com/static/5fc54a51cd1e280355f12772/t/5fc6bf652ac13f1ee9a34894/1606860646150/34763626362.pdf
    • https://s3.amazonaws.com/petuzutemixuvod/jenozivores.pdf
    • https://s3.amazonaws.com/kabisebax/amaranthus_spp.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_off0000bfa7.bin
03c5e10d468d1ebbd82297ca5b31cb6f841a2695beaaad5e8cadf6d8306b440d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA7 4832 bytes
font_01_sfnt_off0000d023.bin
6438adfb60a16e217195dbdfe50355fd605ed71d9993eeeeb820b61609b9087b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD023 11040 bytes