Malicious PDF — malware analysis report

Static analysis result for SHA-256 3500a97d6c0ce767…

MALICIOUS

PDF

69.7 KB Created: 2020-11-25 18:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2319792b3310bb1ae491b5ffd0850739 SHA-1: d6bbaffe74abb46c70c279a30103dd24bcad67f5 SHA-256: 3500a97d6c0ce7679da69acf4d2069d0f3c40f36e3bcc5316d46fe5d8f480a5f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-severity 'PDF_SEO_UTM_REDIRECTOR_LINK' and a critical ClamAV detection. The primary malicious indicator is the external URI pointing to 'https://trafffi.ru/strik?utm_term=sas+current+date', which is described as an SEO redirector for free-download phishing. While no scripts were explicitly extracted, the PDF structure and the nature of the redirector suggest a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=sas+current+date PDF link annotation
    • https://s3.amazonaws.com/varolexexus/motorised_valve_actuator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5f9b48c622be8.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/80122103791.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/activity_based_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/4948933055.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/87dd668d-4283-495b-a580-a3a9820cb73e/kitchen_number_1_bridgeport_connecticut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ba0abf-be58-43cf-8c79-5e5b33726d69/difference_between_project_and_program_with_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443d56a1-2d38-40e6-9c4e-2942aa9c157b/brevig_mission_school_alaska.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52acba99-60d2-474a-8e4d-a8f40c632dc7/thermodynamics_an_engineering_approa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6682185b-6914-4aeb-ae1c-6155220ce8c8/virapevovumozawanalifumul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3131ab5-06e4-491c-a60e-d4cafaf3ebeb/19552316955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad9b6d0f-95f2-458c-9b49-3d044f422259/toothpickase_enzyme_lab_answers.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99F 5004 bytes
SHA-256: faa4bd6e183aae53ba65f6d2b5ec8cef7717ffb4f2686252bba5453a6c7bd6f1
font_01_sfnt_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 1940 bytes
SHA-256: 3c8c70e95e172d87f88249f6e98f5fcd1d779dd22b9512bb6276049fa774e71f
font_02_sfnt_off0000e3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DA 10812 bytes
SHA-256: 0a4952b3c779fd660117afe58e13d4ed3b44208912c68979ef0e26b720351df8

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