Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a75290224c7319…

MALICIOUS

PDF

43.4 KB Created: 2020-09-18 17:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b750dca89de71165007e122d3f70bf64 SHA-1: db67453c2128cb7a3e5ceb5a289f7b5718f38ee8 SHA-256: 57a75290224c7319ad7d6f4f1f9c3100a4f9ef62322dac3a7d3b7f3173dce47f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=factoring+quadratic+polynomials+worksheet', is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.link/wix?keyword=factoring+quadratic+polynomials+worksheet In PDF document text
    • http://files.animalclinicofchardon.preview.pethealthnetworkpro.com/uploads/1/3/1/8/131856039/7258385.pdfIn PDF document text
    • http://files.keays2wellness.com/uploads/1/3/1/4/131437978/metuvolabanobabig.pdfIn PDF document text
    • http://files.liverpooldesignagency.com/uploads/1/3/1/4/131438839/5587694.pdfIn PDF document text
    • http://movojew.christinevilla.com/uploads/1/3/1/4/131437064/3724043.pdfIn PDF document text
    • http://nulonur.naturalc60.nl/uploads/1/3/2/6/132681495/radevudisuxe-tuxige-kajikide-tibowixowutona.pdfIn PDF document text
    • http://nokiz.thompsonzone.com/uploads/1/3/2/7/132741334/ea78303a25ca8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7d6ba4b1-4f6b-433f-9c81-ad7aa2a1ac1d.filesusr.com/ugd/03dcd4_d4275d0918504074aaf3983808b46520.pdf?index=trueIn PDF document text
    • https://de7b2020-59a7-421a-9d7a-9593d8550b5f.filesusr.com/ugd/a4c1fa_a0f46b9540824de19b7a0ea4819592be.pdf?index=trueIn PDF document text
    • https://e37396ba-c88c-4b7c-8650-98bfb583bfd0.filesusr.com/ugd/277b62_ca66a317a6b941cba01d129c40a6e176.pdf?index=trueIn PDF document text
    • https://21e00991-168f-409a-b498-f593669e18f6.filesusr.com/ugd/9b7d8a_fcb8089634114b35953a7311fb9b57d3.pdf?index=trueIn PDF document text
    • https://2048d4db-a35a-4211-a4f6-336a309262a5.filesusr.com/ugd/95bb70_70986209ac854c4eb47831d198d96d9e.pdf?index=trueIn PDF document text
    • https://b95cf443-569b-48ea-960c-4317bb17ba59.filesusr.com/ugd/0dd040_da98c0adbb0c497cb003bcde0cd616fe.pdf?index=trueIn PDF document text
    • https://f94d6b29-a3dc-409a-8339-d95f28463704.filesusr.com/ugd/238140_4670167cdb5b48f1ad61cb6692bd6f40.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 8

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_off00006b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B27 5828 bytes
SHA-256: a25675eeb6010ced1ae207b870b559c10447ccb7d16ae0809bb9ed357d401b31
font_01_sfnt_off00007edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDF 9880 bytes
SHA-256: c1b0c436d1265a57dcb1157c0843b43b5085d52283e7645a3f534e438eebc4a3

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