Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f78d27bf7d2b16…

MALICIOUS

PDF

46.5 KB Created: 2020-11-08 15:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6acf10625e040c526190eb591e885890 SHA-1: 229f80c441c8cfde68c6b03457db93ca5ae38c66 SHA-256: d3f78d27bf7d2b1689e0a2e9fe1814c756ad449b4ab2d8f28319bc2a19e72582
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The embedded URL 'https://trafficel.ru/123?keyword=modelo+beer+review' suggests a lure to a potentially malicious website. The ML classifier strongly flagged this PDF as malicious, supporting the link farm and potential payload delivery. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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://trafficel.ru/123?keyword=modelo+beer+review PDF link annotation
    • https://diwefiramogepot.weebly.com/uploads/1/3/4/2/134265367/25d21e.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/e4c657c932a447e.pdfIn PDF document text
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/79a9b27168bd.pdfIn PDF document text
    • https://zisogojevup.weebly.com/uploads/1/3/1/4/131453725/riforosaseridosur.pdfIn PDF document text
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/putoni.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_5f937e13bcfe8.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/0c94b9059ed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421781/normal_5f981011bbd06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_5f94cea7ca1c6.pdfIn PDF document text
    • https://nifudosuv.weebly.com/uploads/1/3/4/0/134040563/risubaxewenivaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f9189b234895.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xamapebonijos/fl_channel_13.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/tezimola.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/common_interview_questions_and_answers_for_electrical_engineers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 4332 bytes
SHA-256: 17b2f3cb763d1ab8ba89e66a746847be2bebb4ee2c30b1ffc1e4bfdc980af6eb
font_01_sfnt_off00007a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 11068 bytes
SHA-256: 27ec9701e4abcca0d23d4cbae448f39be307ae8a148b58a810e742fca8e3a21d
font_02_sfnt_off00009ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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