Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cc5394c1c92774…

MALICIOUS

PDF

65.5 KB Created: 2020-11-20 01:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d56a212f16257f327a680d7d1f92b38 SHA-1: 1a9da2b98946c0dcfa3f080d5834278689406e5d SHA-256: a6cc5394c1c9277497d9f99d3cc6df516edddf46c4801f0fa15002370b810f4f
162 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and a phishing lure, specifically mentioning invoice or payment language. The embedded URL `https://gettraff.ru/strik?utm_term=sri+lanka+car+rental+with+driver` is flagged as malicious. Although no scripts were extracted, the combination of the phishing lure and the malicious URL strongly suggests an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=sri+lanka+car+rental+with+driver
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/daa175a8-2961-4c73-abfc-759467234b24/39977316964.pdf
    • https://uploads.strikinglycdn.com/files/2c1685d6-d211-4f5b-b9b7-dbfd97f201f4/89318886325.pdf
    • https://s3.amazonaws.com/susopuzupure/78703502394.pdf
    • https://s3.amazonaws.com/satedafadusizo/2017_subaru_wrx_sti_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/df31e2ee-69c8-4c46-ac58-f3f2c92f2b4d/tetupikiz.pdf
    • https://s3.amazonaws.com/zakunafu/aval_kakshi_amminipilla_song.pdf
    • https://uploads.strikinglycdn.com/files/82fac320-4a31-4841-b854-2b918ddbb792/strength_of_materials_civil_objectiv.pdf
    • https://s3.amazonaws.com/mefovu/xaweruxewetuv.pdf
    • https://s3.amazonaws.com/jovekus/4545716167.pdf
    • https://uploads.strikinglycdn.com/files/12f97773-7b20-4ccc-a3eb-0ef0658094d1/93406974682.pdf
    • https://s3.amazonaws.com/jakujakula/ledomikavajarasid.pdf
    • https://s3.amazonaws.com/jirebonudur/better_business_4th_edition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2f5.bin
0c2b491deca302da8fe866f5b4adbf945cfa566c30b05cb79d4230879fcb6fe4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F5 5168 bytes
font_01_sfnt_off0000d499.bin
9b682901215b66e2e37815021c598a43fd2dd4146e7f59a9b82b0dd9235e5d2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD499 10804 bytes