Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1faab6491bdb564…

MALICIOUS

PDF

61.9 KB Created: 2020-12-18 15:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4f542eb2abcf7fd4e66dc978df246817 SHA-1: 97f645dda96c1628035dc71dc759d97c2f09a1ce SHA-256: d1faab6491bdb56411ac6b1ed976320867b41da26074ca37e15830fe71c81f67
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 multiple embedded URLs, with one pointing to 'traffine.ru', which is flagged as a potential malicious redirector. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=evaluation+vs+impact+assessment PDF link annotation
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/1a95067115.pdfIn PDF document text
    • https://xenifopiri.weebly.com/uploads/1/3/4/5/134507673/9635558.pdfIn PDF document text
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/fesanigi.pdfIn PDF document text
    • https://rozujefugupag.weebly.com/uploads/1/3/4/0/134017035/viwexasipizaxereposu.pdfIn PDF document text
    • https://vajizekof.weebly.com/uploads/1/3/4/5/134594154/154540.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/a7c14d90-fe7c-4c4c-a82c-03e7ce308295/revelation_online_housing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7b209d-2020-4c31-84f0-152ff0006ceb/gesat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a94b88-6b0d-4dc6-9285-4256110d5dbf/the_simpsons_tapped_out_apk_unlimited_donuts.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/dusojizavumabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579ae5db-e8f6-40c6-89e7-495bdaa0dc4f/49033279572.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe20b99d793648405765b7/1606295738042/naxokilunapunotibigaziw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB712 5000 bytes
SHA-256: e3b0e4b41af4dcd8c316ec00097bff2ee05d7afad53f2abb4c442ede8a82584d
font_01_sfnt_off0000c80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80C 10304 bytes
SHA-256: 10e3e11f1a653bcd3f907ce269459b057cba3232cf776194f741d4e9a3e0e7e2

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