Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6b64e1008d65ec…

MALICIOUS

PDF

95.7 KB Created: 2020-11-25 13:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b33bc31858509b99da90db3ac06372b2 SHA-1: c539d0958c8d40c031b9df34f4479d9e1f9938f6 SHA-256: 8f6b64e1008d65ecc820cb362afd0c738d8b1bf01e3cc0c3fe2502c220db71dc
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, disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=how+long+has+billie+joe+armstrong+been+married In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87611a45ba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5fbc2e3e30a65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_5fab37876d302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415754/normal_5fa09d7017701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fb8f017c3934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/indian_train_reservation_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7398d4-51b7-482f-85ae-ac76e986c6b9/remington_1858_new_army.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/52658549153.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/nadotoguzapojinugimafurut.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/lufelosokosovofimutamuj.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/amazon_brand_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/febawoxurotikalokunu.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/the_winter_king.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/pokemon_toxic_spikes.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_off00013642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13642 5508 bytes
SHA-256: 8c6f1522f5bc7ee17cfa14f76eafa1df4a0f94e1577ddd808a8910c0244961ee
font_01_sfnt_off000148de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DE 11972 bytes
SHA-256: 71b602605ed4985da789180385ce1b6c4ad80fc77ae953d4db19f7b4bc751bcc

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