Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd08e26d31dfcd5…

MALICIOUS

PDF

39.2 KB Created: 2020-08-16 13:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fc04c4f418860fcac09014aaaf61ece SHA-1: c330da671b12fb1e316f5f28cfbd86fbda39a910 SHA-256: ecd08e26d31dfcd58178f09ca2e56c57fce4f020567163bc4f566a13097fdab0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to obscure the ultimate destination. One critical heuristic identified a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=profit+and+loss+account+balance+sheet+format'. This suggests the document's primary purpose is to lure users to malicious sites, potentially for phishing or to download further malware.

Heuristics 3

  • 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.
  • 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=profit+and+loss+account+balance+sheet+format
    • http://files.communityfencing.org.uk/uploads/1/3/0/7/130739817/gulojaw-patazumetafedu-fuxoxuma-tinuluxi.pdf
    • http://files.southsidemetalworks.com/uploads/1/3/1/3/131379312/fuwufiwofubexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/for_loop_lua.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/1657552650.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/tapupafuroradidofob.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/53773171898.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/84896791356.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/lobiwiterogezopitu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/rubozebeketuninubevujiru.pdf
    • https://cdn.shopify.com/s/files/1/0432/9318/0070/files/ielts_academic_writing_task_1_practice.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/jusiko.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd3.bin
60cf0c8cddb38295c192a11d69e8ceb59fe54acd6ed34c69260a7c4fc0880fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 5404 bytes
font_01_sfnt_off00006ef2.bin
996b324bb9070186525e86133e58937222202edb13acfe027e1e52d1a71a575e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF2 9676 bytes

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