Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f318aa72edfa5c5…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 17:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb5f16d929574e0d7160e84ee8d7bdea SHA-1: 6b81f7bfe0b66245301a2b483730843707361ed4 SHA-256: 8f318aa72edfa5c50cd145630c31d71896124a55a5af06a6904968e3e7f6841b
160 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 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, likely for SEO manipulation. The document body and a heuristic indicate a social engineering lure to install a browser extension or update, which is a common method for credential theft or malware delivery. The primary malicious IOC is the ttraff.com redirector URL.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=chrome+extension++entire+site
    • http://kalemod.eatforfeats.com/uploads/1/3/1/3/131398489/sajejukodivorod_wajibonixumujof_magobibejikexo_mozuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6428/files/strength_of_materials_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/semekokajovonoponud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/wubenexobotu.pdf
    • https://cdn.shopify.com/s/files/1/0449/9243/0248/files/60760643489.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/big_ideas_math_advanced_2_record_and_practice_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5526/files/centrifugal_pump_head_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0435/7249/4495/files/fajisagisor.pdf
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/doctrine_of_hamartiology.pdf
    • https://cdn.shopify.com/s/files/1/0437/5229/2513/files/nuriweja.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/mariner_fighting_style.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/39195916080.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/280680.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_off00006194.bin
22cf9b9d9fc24bd7db3fbdabb7e32161aa61dfcd216626220cf4818e20f500b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 4656 bytes
font_01_sfnt_off00007145.bin
a9e930366ecd2b252edbc4cdae6c6494efdef2062514fc60a80daec77923cfd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 10552 bytes