Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3eef53cc9ba8fa5…

MALICIOUS

PDF

67.0 KB Created: 2020-11-29 21:35:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b961567072b20c9ed5b3be7bcb932a68 SHA-1: e9709642de7ce25438471dcfca6645c3160ac116 SHA-256: a3eef53cc9ba8fa5a87441d64f6b342e92d25f16c3d98fc560db641ddb9c8567
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, particularly the one pointing to 'gettraff.ru', are designed to lure users to potentially harmful websites. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://gettraff.ru/strik?utm_term=condensation+nuclei+are+particles+of+atmospheric+dust+around+which In PDF document text
    • https://xegiwisupanax.weebly.com/uploads/1/3/4/3/134367095/nifeziriluj.pdfIn PDF document text
    • https://kigejowozunafuf.weebly.com/uploads/1/3/4/8/134883406/05f01.pdfIn PDF document text
    • https://gedolumu.weebly.com/uploads/1/3/4/7/134761272/5031627.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/d6a10dba-44b2-4f7c-913d-8ae51a64f1f4/82075754959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04613f96-c907-44fa-9ceb-f416c6c76b4a/7-5_solving_trigonometric_equations_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ea55db-cf09-4044-bfe8-326256180566/moxipipito.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/98010385363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9e2398-e8f7-4b7f-87e8-7eb088a0260e/zavuselasawaribivokar.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/methyl_bromide_msds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332d6790-9197-4ee4-93c0-bf7d7162cc5e/30636922901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e43d8c-9dc9-4db5-b9a2-2af2a2981f40/95490674414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efbc032-9afb-4bbe-9399-137d7066f8df/87351073032.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_off0000c8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BD 5392 bytes
SHA-256: a49755f1d8fe66151efec6542f358abd956bd5e1b22f857bbbcbf6a08ccbedc3
font_01_sfnt_off0000daef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEF 10528 bytes
SHA-256: 2a7134022bcc382fcb094bfbb00f5559f1b57592f61a64205942bad1a6878094

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