Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3bb28758f5b31f…

MALICIOUS

PDF

34.6 KB Created: 2020-09-17 21:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 251747b60514024ab25c8c5d839639ed SHA-1: ac58606356aee527d49f56d0f7751dbc96cf61b3 SHA-256: fa3bb28758f5b31f47e14e8f1e66b295a54e6a4ae4cac13288115ad4b1bcf2e4
184 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, with one specifically identified as a redirector to a malicious URL. The document appears to be a link farm designed to lure users to potentially harmful sites.

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.club/wix?keyword=actex+study+manual+pdf In PDF document text
    • http://files.karenwoodmansee.com/uploads/1/3/0/8/130814644/wabomelaji_veleko.pdfIn PDF document text
    • http://rigemum.biorbnz.co.nz/uploads/1/3/1/8/131856772/pilit.pdfIn PDF document text
    • http://wubex.somewhereintimeathens.com/uploads/1/3/0/7/130738850/fazofokidetu.pdfIn PDF document text
    • http://jezexikag.springvalleygirlssoccer.com/uploads/1/3/1/3/131383483/13dff.pdfIn PDF document text
    • http://panefuzej.lakewaypaddlesports.com/uploads/1/3/1/4/131406893/3365936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://479d5510-bf44-4245-8fab-46d170daf64c.filesusr.com/ugd/cf9ff1_79d988dc7e154fcaa770702ee693092e.pdf?index=trueIn PDF document text
    • https://1c158fba-c2cf-45f8-b236-0840d4a88480.filesusr.com/ugd/aec2ea_ab96f990fdf14fa3a4ede79e8554cbb1.pdf?index=trueIn PDF document text
    • https://f242ba29-536a-4f61-b471-1a9bfe9a3699.filesusr.com/ugd/e2b09b_70575aeca11b4d3f9b18e9732e35aa0a.pdf?index=trueIn PDF document text
    • https://d4b4a664-a029-4ea2-b58d-ec0fc092c9c2.filesusr.com/ugd/296484_1559a695ea5a4fd0a774537bc924d5b9.pdf?index=trueIn PDF document text
    • https://d5d7bcb1-0078-4473-be73-6f93bd12a019.filesusr.com/ugd/4a2613_f2445b3885cc4c60983103d1c77759cc.pdf?index=trueIn PDF document text
    • https://f7f75382-d9db-4086-9cd1-c1c4ab212a4b.filesusr.com/ugd/895bef_acef06cfd3774150ac1e0a3026920549.pdf?index=trueIn PDF document text
    • https://b25e1321-bfbc-411a-ba62-22696deb8ecb.filesusr.com/ugd/f3bfbb_5942aeac9f7b41eb814e095a777e934d.pdf?index=trueIn PDF document text
    • https://4dfb2678-4f22-42f0-8f16-5a842dabc61a.filesusr.com/ugd/7ea8bb_4c8b3746431749abb0c101a3453e4997.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 3

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_off000047e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47E7 5364 bytes
SHA-256: 8f33aa23d6e4c144635e15716adb9812ecc7e5032201830cf9ed063c5d28a151
font_01_sfnt_off00005a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27 10532 bytes
SHA-256: 1bd8d49eaa3993f5fd391ff2027da4aebaacee68ad77f01f41a6aa1eea876914

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