Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e412a3662f3ed2d…

MALICIOUS

PDF

44.5 KB Created: 2020-11-07 20:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d118d4f01d60a61035bccd767d63bf20 SHA-1: 817f837a4eb7dc754bc08d3943fcd0fc25606653 SHA-256: 8e412a3662f3ed2dce6590c8e5aa8c3e2506ada420fe95ace8407920bf1e00bb
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and is flagged by a machine learning classifier as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users interested in 'esl teaching philosophy samples'. This URL, https://trafffi.ru/123?keyword=esl+teaching+philosophy+samples, is likely intended to redirect users to a malicious site. The presence of numerous other URLs, many hosted on disposable domains, further supports a malicious intent, possibly for SEO poisoning or link farming.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffi.ru/123?keyword=esl+teaching+philosophy+samples PDF link annotation
    • https://gejimedetudumi.weebly.com/uploads/1/3/3/9/133997730/zelodabisilasepika.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/nukuwifipejepugad.pdfIn PDF document text
    • https://xakezoram.weebly.com/uploads/1/3/4/4/134497816/94d74e7de345c3.pdfIn PDF document text
    • https://kikunuwip.weebly.com/uploads/1/3/4/6/134687028/c9c3e6ab78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f9c398678342.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/gebozufogojupekajup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_5f96eca4d785b.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/b7d50e2acf269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5f8f93d72714b.pdfIn PDF document text
    • https://gufobigan.weebly.com/uploads/1/3/4/4/134481927/rigire_timuvalidewi_jomugedezas_barasaz.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/fogibi/58482370242.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/literature_and_the_writing_process.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/livadomijofaru.pdfIn PDF document text
    • https://minezonateta.files.wordpress.com/2020/11/72776004096.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/vigebejeba.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6479 5096 bytes
SHA-256: 64c702daa5ad098760cda7c1aba1c541ffd470eeeed5def2e9c8605bdb83ca9a
font_01_sfnt_off000075a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A1 9780 bytes
SHA-256: cd66bee7703936d1753e6af5ec70d159975883bcbecdadfecb084622cb34ef7e
font_02_sfnt_off00009702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9702 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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