Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d12efadba5a5d4…

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 08:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f33419f46e9bcca9de3b3cb87242eb2f SHA-1: 41d09bf8664d73d8484a0caf47d89703e40f6853 SHA-256: 12d12efadba5a5d4d766c2d824c0aaaec3a4473f60eb7fe001c1f82c720508cb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=skyrim+trinity+restored', which is flagged by heuristics as a malicious redirector. This suggests the PDF is designed to lure users to malicious sites, potentially for phishing or malware distribution.

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=skyrim+trinity+restored
    • http://files.foxylockshairextensionsaustralia.com/uploads/1/3/2/8/132816066/1bae22.pdf
    • http://files.purpleribbonpublishing.com/uploads/1/3/1/3/131383398/xasaral.pdf
    • http://files.littlegiantproductions.ca/uploads/1/3/2/3/132303310/rofametazatulez-sipunelop-gekukuba.pdf
    • http://files.myleftlane.com/uploads/1/3/0/7/130739533/2959071.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/10514748315.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/ruvudofozaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/44812406681.pdf
    • https://cdn.shopify.com/s/files/1/0441/0025/5896/files/sikogitugelekivubizef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/kuvumufotupobam.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/97783281692.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4411/files/20174420699.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/77776658036.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8509/files/zupixavatasedite.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3508/files/dizijineguzuxuvepumomure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pezudatilekubad.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/63630724413.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_off00006749.bin
dee9e34bc874dfb8d7c955be55d0b76512bb09dce4089401a8aba1ab3771e6fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6749 5000 bytes
font_01_sfnt_off0000783e.bin
a74aa62a61370bffc4d2d6328121571a34022c5c2c218f14d92bfc5e57262b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783E 10268 bytes

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