Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba9774d6ff0acd3…

MALICIOUS

PDF

70.8 KB Created: 2020-11-25 01:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3a2aafff2deaeee38d453599c529b6ab SHA-1: 27dc714ba801ea1fba46d8752ffcbb9ea6ef25ae SHA-256: 4ba9774d6ff0acd30d1134f86d886e28246df0e5274985d658af07147634e697
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which are embedded within the document body, suggesting a link farm or phishing attempt. The primary malicious URL identified is trafffe.ru, which is likely used to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafffe.ru/strik?utm_term=target+dress+code+piercings PDF link annotation
    • https://tamalokumolegi.weebly.com/uploads/1/3/4/6/134656593/3532956.pdfIn PDF document text
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/gerulowigujitepukipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f9a1d48b17fb.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/a216910a-7a5a-4d03-b36b-d8e6b929be72/61799216530.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/89522723649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e9f26c-3c46-4604-83dc-b6848eb60eb8/poetry_anthology.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/wabefanarumebe.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/bland_isd_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/10221706300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d079bd8e-4786-435b-8b2b-51da73af0431/5206606147.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8D 4944 bytes
SHA-256: a890483c402e46d64637ba9d07f9c76b6ebeff50c8be7328c22a546c6a0283e5
font_01_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 11040 bytes
SHA-256: 3685de994af2ddaca96fac6d01ac6df56b9bda6269461fbc2cd97568571e8a82
font_02_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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