Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c76a7ec96ab5416…

MALICIOUS

PDF

77.2 KB Created: 2020-11-10 17:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 90647674d399433a42c36d178a502234 SHA-1: 02dc9668c3085ea81c3e3640203af4db1279dc93 SHA-256: 1c76a7ec96ab54164adba8714e59eb22489fd50114751577662e49588bd3d750
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This indicates an attempt to direct users to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?keyword=tutore+games+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5f9fbd8eeb64a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f8c226019490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5fa85cbae75ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fa6425b3e45e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f89c7081011a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5fa3e80369454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382949/normal_5f9cb69cddb31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_5fa946ea9e02a.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/73f6962b-cec0-4d41-a325-40e7196b1dc6/pes_2013_galatasaray_stadyum_yamas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bd8acec-999f-4bcd-bb9e-49746b74c6bc/kakizopuvorifabuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b865a2-a029-4fad-812e-2577f92e7341/20802968288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8503d6c0-9c67-48df-b975-3a8c841892ab/tadozigun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7b87d5-3e39-437f-a081-faac127b63f9/zarikakimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3112eb3d-0ef2-4f31-8c2a-72691e60e8d7/77624832795.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FE 4956 bytes
SHA-256: fb6a904190e690a8b53ec9a9dafa60cec27a71600cc95675a95803a1b585366c
font_01_sfnt_off000101c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C5 11184 bytes
SHA-256: bfb7905f20bdfff776f231613d3b9cd6f575f8b53e577117f1864c8606981a75

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