Malicious PDF — malware analysis report

Static analysis result for SHA-256 07de86ab1878d59e…

MALICIOUS

PDF

70.6 KB Created: 2020-07-29 22:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60ee44a76c4a43b0b02ce18aae122c7e SHA-1: b26fbef791bae17518efdbc063fdcfc273e80d26 SHA-256: 07de86ab1878d59ec14e228658150808160def494d7e25cddfdaa45938ffbbfb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.ru/pify?keyword=biophilic+design+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'biophilic design pdf' and the wkhtmltopdf application, likely a lure to disguise the malicious intent. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious document designed to redirect users to harmful content.

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 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.
  • 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/pify?keyword=biophilic+design+pdf
    • http://files.vineyardandwineservices.com/uploads/1/3/1/6/131636941/tanugiperisez-jolekurupit-gakapono.pdf
    • http://files.10keventz.com/uploads/1/3/1/3/131397987/fanufem.pdf
    • http://files.boldwomen.co.uk/uploads/1/3/0/7/130739239/3c0c3a8ea6.pdf
    • http://files.pergusconsulting.com/uploads/1/3/2/7/132712490/jozotiwakulibu-kotozalogif-fiwiv-vokazuvoze.pdf
    • http://files.silverfincharts.com/uploads/1/3/1/8/131871467/e911a57d2bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/7643057618.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/sixafipowek.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/15618204928.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/19967846757.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/lafudidufudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4898/3959/files/xanekobalifomudagut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/65229233650.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/28502120791.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/jisilatabolikixepujuk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6bb.bin
f50629a262fc14cc858ce5b9e8c3590ac2ee3c82810b26e9c40a2393e7dbff9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BB 4868 bytes
font_01_sfnt_off0000e739.bin
93e9f088373a891504e6fc90aff8e75f9c1d735cbbc263c94cab9eb1936cb449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 10772 bytes

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