Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd420c9e17bb1c5…

MALICIOUS

PDF

40.8 KB Created: 2020-09-30 19:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c3773cf128a89557e42efe25f2ea018 SHA-1: 4fa0fa6c80ebddaa927734457aefa0f022050b7e SHA-256: 6cd420c9e17bb1c5b579b87e617fd477fd7a0519ef35e8b4c0f6c0fe83c8c4cc
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though partially obfuscated, includes the URL 'https://gettraff.ru/strik?keyword=3ds+max+2019+new+features+pdf', suggesting a lure to a malicious site. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the infrastructure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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?keyword=3ds+max+2019+new+features+pdf In PDF document text
    • http://files.centerforpentecostalministry.org/uploads/1/3/2/6/132681579/38ed99.pdfIn PDF document text
    • http://files.sondrineleebontemps.com/uploads/1/3/1/4/131483830/9a2769.pdfIn PDF document text
    • http://jeguv.phulrev.com/uploads/1/3/0/8/130873784/86f97.pdfIn PDF document text
    • http://sipit.worldofsong.com/uploads/1/3/1/4/131453850/sejevusemusopuk.pdfIn PDF document text
    • http://files.cliffordsage.com/uploads/1/3/0/8/130874389/8384446.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/nibukepusimojosidan.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/xobijolitigex.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/ripakarugewusuruki.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/570b871c-af40-42c2-ba52-c6950eae9dfe/20863317473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d187048f-e258-4c95-8ded-5b8a8e6720d1/vatozidebanoxokesekukal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f58580-7e86-485b-a851-d9017a7ee7a9/dusodubaxitesudujinami.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 7

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_off0000604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 5864 bytes
SHA-256: abd28bd8765544c0ab53d6ea8e2dd6120830d68a6a8c17351434cea2d6ed0f8d
font_01_sfnt_off00007440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7440 9932 bytes
SHA-256: d033b94d72564fcf3461d08a28e768b12651a8523a3fffb8a10301b6b1bd699c

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