Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d6b952fb78edde…

MALICIOUS

PDF

65.7 KB Created: 2021-01-12 17:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 161387d1a870c8b3987cb2715e89a2f5 SHA-1: 2166f4a4536e7b6a5c4427cc36d7b9e60a9be080 SHA-256: 79d6b952fb78eddea7cf28a413779a3d0fa2d41ed7a17307db844e6dff8791f4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. Although no scripts were extracted, the presence of a malicious URL suggests the document is designed to redirect users to a potentially harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=hark+i+hear+the+harps+eternal+lyrics In PDF document text
    • https://site-1178471.mozfiles.com/files/1178471/moneygram_uk_online_chat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489033/normal_5faf3ccf16540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5fb81fd9c3134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_5fe854df16ac6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fce266142fae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382627/normal_5ff70c021fdff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fec07d3ada89.pdfIn PDF document text
    • https://site-1217043.mozfiles.com/files/1217043/extruded_acrylic_sheets_manufacturing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8759d3a0de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_5fabe18d204ea.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/xovajukoxin/acquiring_new_lands_guided_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/46274204605.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/chevrolet_spin_2013_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/custom_water_bottle_labels_template_free.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_off0000c487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC487 5148 bytes
SHA-256: 3e184127b441b9b374884581179c536c11d72f4e93ec4bf902ef651e82d359a6
font_01_sfnt_off0000d60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 10560 bytes
SHA-256: 3233f62ffe65759d6a03ec1546d20be9701a453f5b62ae21165da3992b48cbbe

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