Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a75cda1f2383ec3…

MALICIOUS

PDF

63.8 KB Created: 2020-12-26 23:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 9ee93e57b51fe26061d7ea913df60764 SHA-1: 49f3973a0c194c2294a4fcb1cf69b42c546deb5e SHA-256: 7a75cda1f2383ec3c0c150ef3a76b82936a71e52340bb4e627c9c5efa5063c5a
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to redirector infrastructure like 'traffmen.ru'. Heuristics indicate a link farm and malicious redirector usage, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffmen.ru/strik?utm_term=bingo+caller+program In PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/521972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449172/normal_5fdfa5af6acdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5fd824ceb74d7.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/ifY2WnS/hacker_simulator_tycoon_mod_apk.pdfIn PDF document text
    • https://bekonerotukabi.weebly.com/uploads/1/3/4/3/134366377/4600398.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/voxexinelosiremejas.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/521348.pdfIn PDF document text
    • https://nukafubesogu.weebly.com/uploads/1/3/4/4/134463640/7a2375b631a42.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/busutafitufe/air_pollution_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/inuyasha_x_sesshomaru_fanfiction_mpreg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88959ded-6cd2-40c6-8d06-d75cd060f5ff/74894040378.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/liber_lilith.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/70988360800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637e8ab9-8f35-4c05-b81e-2970152b33f1/gewazuzosaxugirinilijum.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/34965586890.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_off0000be1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1B 5124 bytes
SHA-256: a8710802dbbaa16bed2a24a8411dcfa60417086aea26454eb132ce2344214ce9
font_01_sfnt_off0000cf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7A 9916 bytes
SHA-256: 755144e86ff8ca53569579635949ae9cb1935896947f6768ab635f2cddabcee4

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