Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd545cee717ff21c…

MALICIOUS

PDF

125.0 KB Created: 2020-12-20 07:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 96c4cc9cf7a368d137760efd38d8c6b3 SHA-1: c98f60f49b93638ffc02c864fec95f17da507e24 SHA-256: cd545cee717ff21c4b88d450368f1a0bee01736b83a1592585e71dd79fc837d2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=cheikh+anta+diop+books+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5fbbbc59a0ca8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/734856e2-ae01-4f47-851d-95bbcc55c033/77602795430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a07fe7-32ea-44b7-89cd-48ebdfa4a35e/went_fast_crossword.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8422fd-f094-4ad2-baf9-b881f52e5e87/vemukimubivaxumulod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff3937f-22d5-4ae1-91e9-0612cf9e4b98/biduxazeparupopig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/badb7af7-ffcd-410d-8cc8-ab521b3cd09a/72214777297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9fc8e00-3a7a-41bb-b7cc-c149242043f2/vudapimelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5950a182-9dd4-44ae-b672-b6045a4f9a8f/32757963729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8574cd37-8c13-4622-b934-959c69d7608b/rajenabikopux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78335c7c-7925-4e95-acd7-4b7b2ddb50a1/bone_devil_5e_stats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b87c5c8-2a4c-499e-a54a-32cd65a3d14a/pathfinder_claws_of_the_ice_bear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1f15eb-00d3-4997-8e8b-536eb4c9e4be/strix_tiefling_sorcerer.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/pegawefo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9EF 5108 bytes
SHA-256: 81a6bfafe920cae660a3f854d5be746a12ca007d742c1e6840d6c090fb12cedf
font_01_sfnt_off0001bb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB43 14080 bytes
SHA-256: 53717fb5eff8294597302ddc2f2812e12be4a2ec55aa0d46c2e0fb4139d3c638

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