Malicious PDF — malware analysis report

Static analysis result for SHA-256 403ab6ab193ab25d…

MALICIOUS

PDF

40.3 KB Created: 2020-08-09 23:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9e487b9b7a3e06eaa1ac25e8b51f6e SHA-1: 489cb98e7fd2aefbedd86fae8bae76e0caa81b80 SHA-256: 403ab6ab193ab25d204fefb1f74124b578f999f310a9e88a15603d287cca8f11
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cartesian+coordinates+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and other Shopify-hosted PDF links. The primary intent appears to be redirecting the user to malicious infrastructure.

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=cartesian+coordinates+pdf
    • http://files.polymerall.shop/uploads/1/3/2/6/132695280/623752.pdf
    • http://files.westashdesigns.com/uploads/1/3/1/3/131398479/mawavoban-bugowawax-lepireserov.pdf
    • http://files.alissaellisphd.com/uploads/1/3/1/4/131452827/844207.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/93312454854.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/dofewebuwijalifoxupotaxof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34597476450.pdf
    • https://cdn.shopify.com/s/files/1/0438/5233/3206/files/45513940808.pdf
    • https://cdn.shopify.com/s/files/1/0428/2685/8662/files/65877316192.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/wijagifimoginalorivis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6806/files/remove_hen_from_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0430/9817/7693/files/electric_normal_pokemon.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/bticino_interphone.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/dev_beats_down_low.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2557/files/aoc-_cv-_100.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/rurugigul.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_off0000617f.bin
9d7839fba3e8ca6d69382584cd25a4edd769c73d0d61b8db167f97a85de364c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 5024 bytes
font_01_sfnt_off0000729e.bin
2b44aea1f94faf154a00d6b4a32028487809336e88a2d8a0af8ea8ec45c6c2af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729E 9980 bytes

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