Malicious PDF — malware analysis report

Static analysis result for SHA-256 e094513150fae5c0…

MALICIOUS

PDF

38.4 KB Created: 2020-11-02 00:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7ca43823a97523c74b98eaf8804456d6 SHA-1: 9576fa6b31fab6443258324fc9e39a1aadcd61a1 SHA-256: e094513150fae5c009654dd82c5c83f355307a368cde554612518481c67541e6
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.ru/123?keyword=microsoft+word+crop+with+shape In PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/f02d87204da67.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/vopirubigov.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/4407878.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/penatotusiri.pdfIn PDF document text
    • https://fenagedel.weebly.com/uploads/1/3/4/3/134316540/7138076.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/9285d8e6-fce6-4157-b440-64855933d380/fejotezul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e6deec-5567-42a6-9afc-b48a9e8a91b0/personal_narrative_graphic_organizer_6th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3426/1679/files/inverse_of_linear_functions_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/laxedagujoruwezigutusixu.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_off000057df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57DF 5308 bytes
SHA-256: 1b67ccf9687764bc1815afe7df87d7da2e7a26cee77dae0850692c267a22a84e
font_01_sfnt_off00006a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A08 10268 bytes
SHA-256: e27da17ef474ce9372dcb75394d7bee545467fa60ae35dc79490d07ae89bd113

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