Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fd02ea1d11c362…

MALICIOUS

PDF

41.7 KB Created: 2020-07-10 13:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 720188ce9d32772f86d70af6063c5225 SHA-1: e22b9ced87dd6660fb7f03408c67294450a55f6f SHA-256: 12fd02ea1d11c362f9cf25df43e137b5cc8cb8011d67f15e97c44ae5195bde4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to suspicious domains and appear to be part of a link farm. One critical heuristic identified a redirector link to 'ttraff.ru', suggesting a malicious redirection chain. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially obfuscated, contains the same URLs, reinforcing the intent to drive traffic to these sites.

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/wb?keyword=manual%20for%20white%20rodgers%20thermostat%201f80-361
    • http://files.solkitchenfoods.com/uploads/1/3/0/8/130813799/zuzedo_wasejotu.pdf
    • http://files.chinookriders.ca/uploads/1/3/1/4/131453934/9f5465422db.pdf
    • http://files.megastone100.com/uploads/1/3/1/3/131398253/kalunezodinive.pdf
    • http://files.tallsmallproductions.org/uploads/1/3/1/4/131452741/majaxuvifut-vopegasumo.pdf
    • http://files.mrsbartelsphysics.com/uploads/1/3/1/3/131398517/2810070.pdf
    • http://files.frankklohr.com/uploads/1/3/1/4/131408062/89ae001fecef.pdf
    • http://files.minneysyachtsurplus.com/uploads/1/3/1/8/131872285/7373998.pdf
    • http://files.ripmarkens.com/uploads/1/3/1/4/131409909/7335212.pdf
    • http://files.brendaniman.com/uploads/1/3/1/3/131379115/xetuzonej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zusuxomo.files.wordpress.com/2020/07/28547632491.pdf
    • https://zosabepoburi780433350.files.wordpress.com/2020/07/fareveruvavadufasug.pdf
    • https://xuvabogov.files.wordpress.com/2020/06/92733229768.pdf
    • https://dupalusojo.files.wordpress.com/2020/06/mosorikukunolinigidamewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/lobuzegegamojum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tapowizilefaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexikebesadunav.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/5444270165.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_off00005a04.bin
22fefd1631ce4d6e9ac233156733db277e05ac177dab2429e9cad368a13d89c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A04 6036 bytes
font_01_sfnt_off00006e7e.bin
807d0bc7a693f46a0f17ea6f7056a726df24c560d48680436e2d473e23ec1e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7E 13808 bytes

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