Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff893118082be1f…

MALICIOUS

PDF

44.2 KB Created: 2020-10-27 21:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1449a5887f812479a1f82e7225254aef SHA-1: 1e88fa75822ce44c77c361afca06b32d320cba47 SHA-256: 3ff893118082be1f38bf2c7f16e5d66ad59193cf8ad571375e562da2701a6969
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by an ML classifier and contains numerous embedded links. Several heuristics indicate it functions as a link farm, directing users to potentially malicious redirectors like 'gettraff.ru' and hosting many external PDFs on disposable domains. The document body, though partially corrupted, contains the lure "Gold test kit for sale", suggesting a phishing or scam attempt.

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://gettraff.ru/strik?keyword=gold+test+kit+for+sale In PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/didezerug.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/8f5d941f6.pdfIn PDF document text
    • https://kaxutaxi.weebly.com/uploads/1/3/4/3/134387751/4160649.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/1911800.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/3175599.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/zogukulegumi.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/malejemiwejasuvili.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/gewedun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f89d246a988f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f927bbb0d816.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/fec52247-5cd4-4220-903b-e84051ee70b3/vuderofuvamosiwozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40469a8-25c6-45ad-879f-2eee3246ac8e/55518648680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb97592-9ae7-4c24-b81b-a4f6d74786ac/28347937930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28130bf5-3190-4843-82ce-ba087cc13efb/pizomof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d55af780-1791-4eab-b9cb-876aa1b44846/77582343766.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_off00006e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 4996 bytes
SHA-256: 7d0062461375a1d59e85c3d6a7115d38e01ac6462cf71c63458b05b3cd70a8b6
font_01_sfnt_off00007f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2A 10676 bytes
SHA-256: 43b439208301828a54fd28a76bd678ff43dcfc0633b7f920ba904cd0246e8b8e

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