Malicious PDF — malware analysis report

Static analysis result for SHA-256 793a3cd1e6e51f74…

MALICIOUS

PDF

57.6 KB Created: 2020-09-21 11:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 439fab13f52e74aa8861f1f06f59b41d SHA-1: 1b99dc96b8bd64a81c0e2053f6df15272ca3adda SHA-256: 793a3cd1e6e51f74fba3536df48a7712e73eb8b22345a3f991cc851789ec7aab
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many pointing to disposable or suspicious domains, and one identified as a malicious redirector. This suggests the document is designed to lead users to malicious content or phishing sites. The ML classifier strongly indicated maliciousness, supporting the classification of this PDF as a malicious link farm.

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=discovering+french+nouveau+rouge+workbook+answers+unit+2 In PDF document text
    • http://jolugobe.xcivcouture.shop/uploads/1/3/0/7/130776246/4691736.pdfIn PDF document text
    • http://files.lifes-a-trip.com/uploads/1/3/0/9/130969059/022d1dfc228362.pdfIn PDF document text
    • http://ninubo.ewsevents.co.uk/uploads/1/3/1/6/131606402/3609055.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/20401894717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/commerce_township_police_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91428743782.pdfIn PDF document text
    • https://3b66f482-a922-4362-8c2d-bd199378cf01.filesusr.com/ugd/65d6f7_29dcbb5f74fe44ddb6b476c227b140ed.pdf?index=trueIn PDF document text
    • https://90516c9b-6c8d-440c-99b3-7c523392ab6f.filesusr.com/ugd/9058e5_265881acbdc248809c53d3440070a205.pdf?index=trueIn PDF document text
    • https://d3134b45-dfd9-4921-8128-7cfe27f386a5.filesusr.com/ugd/3e87bf_196b305411374753b58c21901d6eac47.pdf?index=trueIn PDF document text
    • https://9bed1d74-c945-4572-8429-993c7073fefe.filesusr.com/ugd/c2bf0a_605baa77297d4f9587df4c38bb4f2670.pdf?index=trueIn PDF document text
    • https://58aa49b7-8f13-4579-862e-b89535f1201f.filesusr.com/ugd/a4ea6c_69a6cef553134b159dff13ffa90a0d24.pdf?index=trueIn PDF document text
    • https://0f1ab563-a6ec-4fd7-86a0-7fd47f787b7f.filesusr.com/ugd/5926b4_38d37ccd49944d92987bb5f3b6864855.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 2

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_off00009525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9525 5600 bytes
SHA-256: 323a12479c4a6cfe45d77ad56ac638a3b7cc4e7dbf604764756751292fce4775
font_01_sfnt_off0000a852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA852 15872 bytes
SHA-256: e82d0486a3d132eb9c8399ad2902eb726f4e71d1088c6f14d75f4a6b6fa36036

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