Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74a4c23d4f1a280…

MALICIOUS

PDF

65.7 KB Created: 2020-12-26 19:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e2595261a6d8a7bd454efac3cb7aea12 SHA-1: 187058c91dc30214188faa3f04846b3992e0b375 SHA-256: d74a4c23d4f1a280334c44810769cd107104d7e19709814211bcb390e96b2743
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and the presence of a malicious redirector suggest it's designed to lead the user to a harmful destination, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=razer+kraken+headset+pink In PDF document text
    • https://static.s123-cdn-static.com/uploads/4455890/normal_5fe3a9faab2ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_5faba1ab21981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375352/normal_5fc5480a2d4e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5fa251706868c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5fc4fe7c36871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_5fae5601a5440.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426421/normal_5fe229c0354af.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/oihDuck/general_hospital_nelle_and_julian.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4b4aab2a-2641-41bc-8d58-df86b082ce22/64372283121.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/94823665379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7929cd-024a-41ee-b51d-a569e6fd3f25/island_of_the_blue_dolphins_vocabulary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB654 4812 bytes
SHA-256: e54808fb3538a578524aa271bd7f2d7375f3f04221501afbd60896f485ee2d1c
font_01_sfnt_off0000c6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A3 11096 bytes
SHA-256: f6f0ad26d9cbfd9878e6bdb1ad13cc190b97cd61d4e6b1d651d6c1c2af29ad33
font_02_sfnt_off0000ec68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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