Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8eca1209133b21…

MALICIOUS

PDF

75.5 KB Created: 2020-12-23 08:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8dbba4dc41aacc9dc61c65d87fc0cf0 SHA-1: d4cbf99e7351fc8fe15653be4307dc6345c983d8 SHA-256: 3b8eca1209133b2119a18abb789701037dcaf94448d1c9d427a5b4682c7a5a61
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector and part of an SEO link farm, designed to lead users to malicious sites. The embedded URLs, particularly 'https://gettraff.ru/strik?utm_term=tiger+shroff+songs+new', are flagged as malicious redirectors. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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=tiger+shroff+songs+new In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_5fa3c2d0be36e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472764/normal_5fa8f637379fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376096/normal_5fc3e42980771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f92a95d4f8c4.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/593160.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/b049d068-83f7-4146-a9d1-18d0a67428cc/nuvegigav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ddc3c6ccf69f354dec2/1606372830740/wekixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbe76d8-de0e-4ef7-9186-f4bb3d18e1a6/wigimiwume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/133f88bf-b6a8-46d4-8f77-00262b8d9161/38059395001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d200b40c-12f2-422e-bf67-975aac8a47b7/eagles_football_logo_clip_art.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E0 4828 bytes
SHA-256: 12ccf4d14a6cd4f53e7adde2e5443f6ab0814cd540af4bf40f33b83ffae40398
font_01_sfnt_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 2140 bytes
SHA-256: fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2
font_02_sfnt_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 11508 bytes
SHA-256: 5583cbb5132c174e178f30d83dbb2bf4aece2a217cee87f5c27743bdd105aa5d
font_03_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8
font_04_sfnt_off00011948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11948 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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