Malicious PDF — malware analysis report

Static analysis result for SHA-256 3516445915450c85…

MALICIOUS

PDF

68.6 KB Created: 2020-11-25 23:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d078b3c6c2586265dc2b2986e8765d8f SHA-1: 4764e5847c0f0c7f8c5158346434a0baaaff71a2 SHA-256: 3516445915450c85907285336de5e694a2ff396108d6847223c8a71ce2f38b39
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, with one pointing to 'trafftec.ru', suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=add+line+numbers+in+word
    • https://cdn-cms.f-static.net/uploads/4402964/normal_5f92f6af2d285.pdf
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/d91c2928fdfa0.pdf
    • https://puliwavigajog.weebly.com/uploads/1/3/4/4/134469254/gibuke.pdf
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/gibozuginovak-josorad.pdf
    • https://woliwaluv.weebly.com/uploads/1/3/4/6/134686062/sasawugivukawede.pdf
    • https://cdn-cms.f-static.net/uploads/4424637/normal_5f9ede5495596.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d92709b1-d565-4b69-85f6-4d1b68b465b0/damodatapijabizudogidor.pdf
    • https://s3.amazonaws.com/rufonali/johnson_and_johnson_credo_hotline.pdf
    • https://uploads.strikinglycdn.com/files/b22b8e4a-9d0e-4d15-b9ce-5102376d22c6/prolectrix_sewing_machine_spare_part.pdf
    • https://uploads.strikinglycdn.com/files/bfca9689-110b-42f7-b9c9-05229edf7dc7/inception_designs_lpr.pdf
    • https://uploads.strikinglycdn.com/files/f946d462-475d-4677-9886-21f02ccb0ac5/27833130257.pdf
    • https://uploads.strikinglycdn.com/files/078dda1a-2071-4184-99aa-4bfd21d814a8/amazon_senzu_knife_sharpener.pdf
    • https://uploads.strikinglycdn.com/files/82479321-65e0-4e00-99f3-39c7c2c95d07/bradley_hubbard_oil_lamp_parts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c431.bin
530de950d54dd6996bd7a94e1e606116099661f04b032b2efcd7ecfa3623fbd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC431 4784 bytes
font_01_sfnt_off0000d44e.bin
b10ce23e1fe10675f0f3e7d3b1327600d400900bc73e56cc2562db768fe2e633		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD44E 10320 bytes
font_02_sfnt_off0000f7a3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.