Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffce4539f30326d…

MALICIOUS

PDF

37.5 KB Created: 2020-07-28 22:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 829bfce497ca0b0e21ba14cb21f8c5cd SHA-1: 0204f391fcc97fbd56e48fd50c0ce4b54be39a51 SHA-256: 0ffce4539f30326d99932e942e0ea6f2a476547389a6362ae31b2fcc61418d75
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, suggests a lure related to 'bride and prejudice movie free'. The presence of numerous external PDF links, many pointing to Shopify, indicates a link farm designed to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=bride+and+prejudice+movie+free
    • http://files.onewayjesusministries.org/uploads/1/3/1/0/131070149/menomiwexekepopi.pdf
    • http://files.stjamespa.org/uploads/1/3/2/3/132303005/fudovodi.pdf
    • http://files.joanrobertaryan.com/uploads/1/3/2/6/132696112/3406846.pdf
    • http://files.fourlittleoneshilo.com/uploads/1/3/0/7/130776674/b06fe4d23a.pdf
    • http://files.martinchilando.com/uploads/1/3/1/8/131856034/mugevelelekarul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/bemituxoluzotoxus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/fuwepizutimimaroxalabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2736/files/wiluzimejukemage.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/xodesajijewiti.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1736/files/22273921138.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/94500060590.pdf
    • https://cdn.shopify.com/s/files/1/0432/0411/6637/files/vekekupoki.pdf
    • https://cdn.shopify.com/s/files/1/0433/8434/0630/files/gezenirexozevim.pdf
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/tuxulifudobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/10594379000.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/39922404795.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_off0000561b.bin
06cc6f68d97ba46b74d2f7ad4020b6d07d0cc7e0fb2649cd4b4705c5dc764d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x561B 5076 bytes
font_01_sfnt_off00006749.bin
beb7c20a9a35ea782e12689b8a1c29329315b75c838055345665ce8a167bed8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6749 9740 bytes

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