Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75e7c3139a87dba…

MALICIOUS

PDF

39.6 KB Created: 2020-09-17 05:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f7448bee5ecf0d77c62b3719fd15e99d SHA-1: f0e89ea17b6d8e6cb8f37958d017794b75b9f104 SHA-256: c75e7c3139a87dbaceb17bef763e30bccbc4ce1fa8f7f7c49377da0fd8e02356
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'punnett squares worksheet' and a URL that aligns with the malicious redirector heuristic. The presence of numerous external PDF links suggests a link farm for SEO manipulation, likely to distribute malware or phishing content. The ML classifier also strongly indicated maliciousness.

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=introduction+to+punnett+squares+worksheet In PDF document text
    • http://lowavasu.displayzon.com/uploads/1/3/1/4/131406557/2154487.pdfIn PDF document text
    • http://files.coutret.com/uploads/1/3/0/7/130776204/bilavi.pdfIn PDF document text
    • http://xuwipo.taylordesignarchitects.com/uploads/1/3/0/8/130874493/2232213.pdfIn PDF document text
    • http://wonopizux.moravianseminary.org/uploads/1/3/1/6/131606490/nupimovuvabewozetaj.pdfIn PDF document text
    • http://files.simplyserene.com.au/uploads/1/3/2/7/132740338/fobez-masiwutexe-mizeboba.pdfIn PDF document text
    • http://talox.m.transformationlifecoaching.net/uploads/1/3/0/7/130775403/webijuluku.pdfIn PDF document text
    • http://files.spiritualbirthing.com/uploads/1/3/1/3/131380128/kotatus_ravuso.pdfIn PDF document text
    • http://gexajodu.ticbali.net/uploads/1/3/2/8/132816165/tuwukidapi_dolukisik_bekijuf_jozabuzeropa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ccec6b51-017f-4bf4-85d6-eab4d616503f.filesusr.com/ugd/95ea6b_5e4c216fe5e2411e8997870ea8c90dae.pdf?index=trueIn PDF document text
    • https://59e9f2d9-ee95-45b3-aa7b-bdb56fb16437.filesusr.com/ugd/d31907_f1766eca5ec644b4a0ca410876db1de1.pdf?index=trueIn PDF document text
    • https://903a1085-6edd-4a70-9bad-3005a41429e2.filesusr.com/ugd/31bf02_a16ef22e0d3846148924563aed647250.pdf?index=trueIn PDF document text
    • https://c9263292-f81e-4f6d-8ad4-5d156e405bac.filesusr.com/ugd/685707_9a24167bce984fce8d0f41cd3a323d0d.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
🗂 Part of campaign: classicsenglishliterature.com 7 samples

Related samples 6

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_off00005e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 5348 bytes
SHA-256: 8c839e9b7070207c01f63b5aa9c17d8e2a67fbfa44fa763d2149131e2c56b8ab
font_01_sfnt_off00007058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7058 9768 bytes
SHA-256: 9ff5eafaef385f1b76c08ba845e772ec05e7c5e6502dabadef240a605d06676e

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