Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f276a21f7f0b7e…

MALICIOUS

PDF

52.7 KB Created: 2020-08-18 16:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 655fe1648c2ce4ddde4fa10b3885b3fa SHA-1: 194c6b1054ed81fc1b33c82709aed68d7b71a87d SHA-256: e7f276a21f7f0b7ee2c187f7674a1b0de5416d9052c52bc3bee69be0e3993ebe
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=az+diamondbacks+road+uniforms. While many other links point to benign Shopify domains, the presence of the malicious redirector and the sheer volume of links suggest a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

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=az+diamondbacks+road+uniforms
    • http://files.jenniferteophotography.com/uploads/1/3/1/4/131453194/631c9a.pdf
    • http://files.magazinebrighton.com/uploads/1/3/1/1/131164081/7cdf75512.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/41716321718.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/current_affairs_january_2020_download_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/31330106674.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/38151282586.pdf
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/57862877137.pdf
    • https://cdn.shopify.com/s/files/1/0443/8904/0294/files/intel_graphic_media_accelerator_950.pdf
    • https://cdn.shopify.com/s/files/1/0453/2695/8747/files/wexifokizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/xaduwutekilenanab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/autocad_import_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/94434745541.pdf
    • https://cdn.shopify.com/s/files/1/0432/9229/5333/files/60232269016.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/7459931547.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/jexedakupijekavariwatore.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/mefajugitizevukiparula.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_off00008e05.bin
f9cb36a834253daf2e3da7a8038a50e4bcbe5d725a1e221e4f6aac43adbcd12a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E05 5380 bytes
font_01_sfnt_off0000a041.bin
2d2337dda80a595539933ad568b7e25682817c41ef0f0a7623c5f4ea5a2e25f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xA041 10920 bytes