Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1a40e8ff0a9c57…

MALICIOUS

PDF

58.8 KB Created: 2020-11-24 14:15:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: eaae17b4c4e4cc94391ac5a012d78809 SHA-1: 258efde77bbb859ba8f8a3db814011bbfd9821b0 SHA-256: 9e1a40e8ff0a9c57397e3aebe2bdba05a6d591eec2d77fd7e7ba4c5c503bd1b0
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector (traffine.ru) and others forming a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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.
  • 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://traffine.ru/aws?utm_term=tissot+watch+user+guide In PDF document text
    • https://zewonawexekuke.weebly.com/uploads/1/3/4/3/134318694/suvif_zobepuguvaloxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479240/normal_5fbc8a5674e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_5faf77ce4db73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f8b3c8fd22fc.pdfIn PDF document text
    • https://bosebekepomij.weebly.com/uploads/1/3/4/8/134870535/nevizabapesefi.pdfIn PDF document text
    • https://kujavubudiza.weebly.com/uploads/1/3/4/4/134497056/kumovowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fb55d71ee166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5fa195d922caf.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/8f539fd7-eaef-4ca9-8fd7-1dedd8cefce8/gujegemexomudetoxoxepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7c27ba-edf5-4995-aae9-6e6918507ab6/wovukeg.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_off0000abc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABC8 5212 bytes
SHA-256: 3550d914ab7e469b6521cfe33bb030865c9df051a9c4bee171449708ce33a417
font_01_sfnt_off0000bd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD88 9820 bytes
SHA-256: 951bde59c522ef737980d3d58d56f73586c574d866d0ec4a30326460346b1d4c

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