Malicious PDF — malware analysis report

Static analysis result for SHA-256 331ddc729928f0bb…

MALICIOUS

PDF

34.7 KB Created: 2020-11-06 19:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 335353b979d0094a0dc300046283c58c SHA-1: 5b5a8fa0dc36a3135813eace85acbf4e00811dfe SHA-256: 331ddc729928f0bb9cb434029f4cb9de4c92eb936dd491c8d22604cd530d212b
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly hosting, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests it's part of a larger distribution network. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its direct user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?keyword=moeder+ark+survival+evolved PDF link annotation
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/dotiwisoxoz.pdfIn PDF document text
    • https://bugukafu.weebly.com/uploads/1/3/4/4/134490359/4976603.pdfIn PDF document text
    • https://tipezigixak.weebly.com/uploads/1/3/4/3/134339593/tawebozejurokado.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/189724bb8fc03.pdfIn PDF document text
    • https://jibisovewa.weebly.com/uploads/1/3/4/6/134653871/5024272.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/fuseni.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/sawopovesura-bofufekiwir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aff3e79-c754-44a2-8687-998ebd913407/5629254223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05b1e4f-0419-444d-b3be-990f53069e69/deregarazonijewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592c66ba-77f7-497e-95dd-458ff1c066a8/2758474295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18adb8e5-9c7e-4d08-945a-5094b5d86a2f/vonotewajujerofakefok.pdfIn PDF document text
    • https://detupuluxef.files.wordpress.com/2020/11/63220981270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1a41f2-0670-4940-a298-4e8e53bcbd01/wejutef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc2bf14f-38e4-4836-afea-7bec37a5fd71/kedoxuzi.pdfIn PDF document text
    • https://gisivimumoz941229752.files.wordpress.com/2020/11/kapemeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94a32e2-212a-45ba-b448-0b4991dfe3e8/wolf_life_cycle_photo.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 4644 bytes
SHA-256: 8eda099c110cd8dd8de35900f72a5e4f1df18ac2421cb9b445f47f34e99b7dab

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