Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaaa4ce0ee5bda8…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 22:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e16300ec3fa7cceb7dea7af69037f9f4 SHA-1: 2afe5edecc686f47b025f0e37f0bf5ad00f30e46 SHA-256: bbaaa4ce0ee5bda813b080b83d33dbd0cb579d8b870cf6862890d060a90211c0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=kenshi+recruitable+prisoners+mod+guide'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to benign Shopify domains but some to unknown domains. The document body, though heavily obfuscated, contains the malicious URL. The presence of a visual download button lure further supports a malicious workflow.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kenshi+recruitable+prisoners+mod+guide
    • http://files.tantrumsandtofu.com/uploads/1/3/1/8/131871467/6365592.pdf
    • http://files.kbarnestravel.com/uploads/1/3/1/4/131438019/47f8cd7a50bf61.pdf
    • http://bapigud.sharpening-solutions.com/uploads/1/3/0/8/130814471/3308286.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/home_inspection_checklist_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/virevuvijegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8053/8526/files/31312759179.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/react_render_squares_with_loop.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/44444527283.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7217/files/37657823514.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/tumenetiravidixewir.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/fenig.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/12465282537.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_off00006586.bin
fcd943cdf4802e07c869961cb678dfe5086f2dd4d84fed9a383ed3a2b4a75be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6586 5596 bytes
font_01_sfnt_off00007852.bin
f963b34d46789860b2fd0dd9b28757def14648cd42533a282f0fae7f3f7fbe13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7852 10120 bytes

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