Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e4168f419b39b5…

MALICIOUS

PDF

37.8 KB Created: 2020-09-09 18:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec20a7c1209a945c087a96eacdc08cfb SHA-1: e73a751448f835f864b53c34f9c508af57ec556f SHA-256: d9e4168f419b39b523a25b43aa613f75c506a5f3612d03059f0cb062f3a7f321
184 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one critical heuristic firing indicating it redirects to known malicious infrastructure. Another critical heuristic identifies this as a PDF link farm, suggesting a potential SEO poisoning or content hosting abuse. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the extensive link farm and malicious redirector point to a delivery mechanism designed to lure users to external malicious 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=buxton+nc+surf+report In PDF document text
    • http://lupume.stampedconcretevancouverbc.com/uploads/1/3/0/8/130874655/4c505544b635.pdfIn PDF document text
    • http://dalita.myerstoolrental.com/uploads/1/3/2/7/132741100/pafuwafu-kixiwid-subanagogarafer-wosotisox.pdfIn PDF document text
    • http://files.iatselocal112.org/uploads/1/3/0/8/130814926/1791455.pdfIn PDF document text
    • http://files.factsorfictions.com/uploads/1/3/0/7/130775516/da831205d35.pdfIn PDF document text
    • http://tosen.theplotterprincess.com/uploads/1/3/0/8/130874493/febavipagasumepugi.pdfIn PDF document text
    • http://sedip.hollywood-resumes.com/uploads/1/3/0/8/130874493/buzufede-joterewilofana-rexilibidikivu-zogokagidu.pdfIn PDF document text
    • http://files.emilygilldesigns.com/uploads/1/3/1/1/131164386/gikurotevamedok_fotix.pdfIn PDF document text
    • http://files.straymongrel.com/uploads/1/3/1/8/131871894/4cc60b638a0f8e.pdfIn PDF document text
    • http://xatof.lastfrontiermusic.com/uploads/1/3/0/9/130969679/nasipesaxagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/dd4472_a6800cfa2a0b46eaae383e1506ab5ddd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4aae87_58c324e1f0ba4458a03ce230e994d32f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/83e584_3aa5f7546c6f407e8e9c890d604d4ac6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/50de67_a7e678611cef46be866b5f1704231f0f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc207a_79aeea259dab45c595a3445271a2e77b.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 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_off00005590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5590 4884 bytes
SHA-256: 4d8c339b12b2c471c88addd81754a59b42ad1b7495f01da6c144b75b601a73f7
font_01_sfnt_off0000664e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664E 11168 bytes
SHA-256: 38884d8c8a4e3a538bc215c3e5f86b8fff33bd86749e769ccae49505f59a060f

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