Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb902191dcc17602…

MALICIOUS

PDF

39.2 KB Created: 2020-09-18 03:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e34bbaac7173bdf0d8657b74af2d391e SHA-1: 34a236e5c94396c8d2a274c2583d35132fc13b5c SHA-256: fb902191dcc17602d246316722814d584eae808ad6d778a7c5d05488dcb6ceb6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to lure users to potentially harmful sites, possibly for credential harvesting or further malware delivery. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.me/wix?keyword=undefined+terms+and+basic+definitions+worksheet+answers In PDF document text
    • http://files.chrisstruykbonn.com/uploads/1/3/1/3/131398214/8231315.pdfIn PDF document text
    • http://files.mendedhearts117.org/uploads/1/3/1/6/131637125/dufeduw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://893971ec-3ef5-4b68-b131-09e19b9c590f.filesusr.com/ugd/76dd3d_6a5a867eb6ff4d988588584997b5d093.pdf?index=trueIn PDF document text
    • https://876bdc9d-d934-4004-94ad-a5633ec7ad16.filesusr.com/ugd/03ae60_b8e328a614aa4acb9714477b48c53cc4.pdf?index=trueIn PDF document text
    • https://889f9af8-b8a8-43cd-a934-59fad70eda9f.filesusr.com/ugd/cc14e4_4b0d4d47db7f4e4d9a0319295c4b1e6e.pdf?index=trueIn PDF document text
    • https://9642ee5d-0002-4805-8e7d-34d03b638fa6.filesusr.com/ugd/c83fdb_1a6cce916bbe426fbde52ac399e95579.pdf?index=trueIn PDF document text
    • https://6097fb04-7ba8-4b95-928c-a1efe2fc0efc.filesusr.com/ugd/4329d7_89f8185e2ec846908a9d526754df02f6.pdf?index=trueIn PDF document text
    • https://2c6d6692-e149-4414-a149-4d9a3d1473b5.filesusr.com/ugd/3f80ec_ab7d1d4de61e454291c2cd48d977bdcc.pdf?index=trueIn PDF document text
    • https://c0de89d7-a383-4514-99a1-287fc06e3994.filesusr.com/ugd/48bf55_7aec878fca7947ae8e60510463b91dfb.pdf?index=trueIn PDF document text
    • https://235847af-367f-4307-95ec-087b91f47ca4.filesusr.com/ugd/33a16d_3fe3136f0da344eb9024f6c93c0578dc.pdf?index=trueIn PDF document text
    • https://a8be381d-9c88-4e18-8d43-cdf0363828ad.filesusr.com/ugd/69b86f_13fd570c0cbe4742bf2a4ae83bfe6bc2.pdf?index=trueIn 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 4

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_off00005abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABE 5516 bytes
SHA-256: 37453cdf099f9b7ab8b08cd14fc9816db2b56036689ff1481c466b72cea66a9d
font_01_sfnt_off00006d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D71 10172 bytes
SHA-256: 9ad29931330f4b6f7f60b2647f6fe411bf82ccfad269a94164204716881b033e

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