Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ac717edddbf875…

MALICIOUS

PDF

71.2 KB Created: 2021-01-08 18:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b95bc38aab7e140f2206b1a448401eca SHA-1: 78cc5298e5c960517c458713cc493fd3df46b01e SHA-256: c2ac717edddbf875ee7195b375dbf1fed91407611befdacc1cf2d1abb3a6695c
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, which is likely used to deliver a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Sam's club french bread nutrition information'. No scripts were extracted, but the presence of malicious URLs and high confidence detections points to a phishing or redirection attack.

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/aws?utm_term=sam%2527+s+club+french+bread+nutrition+information In PDF document text
    • https://cdn.sqhk.co/dopiporajen/gibBOVV/95561530749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5f9ce67c69e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f8cf79e6a9da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f87d2e345d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5fd68e2de97b6.pdfIn PDF document text
    • https://cdn.sqhk.co/fajixojemom/jbicgdi/vagogesidenepobiwiguxil.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/4idiiMV/human_eye_drops_for_hamsters.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/faluzotixupi/aws_big_data_architecture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8117ae1b-485d-4cde-9c79-5c821488c605/zejafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f42d8a3-9014-4a45-aacb-ef4be4a84db8/pukagixibesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7fa1e9-43ca-4c4e-b6d0-a7af22273469/61382903248.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_off0000d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 5536 bytes
SHA-256: 142aebd41558a03a5c0522b51c5ec5b1be8220e00d53f7cada955674ec88d84f
font_01_sfnt_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 10320 bytes
SHA-256: 70feccd52d2fab9248b14d03a2ba740a77ca235dcdce2751677da502d78823e8

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