Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7270dc78616c23…

MALICIOUS

PDF

116.0 KB Created: 2020-07-24 03:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c490a7a58fc654d52a58c49884b5553 SHA-1: 08fa3468e6dcd4aa46a8e9a97f357dbf02ebfaa5 SHA-256: 8b7270dc78616c23c4364498e597f5b980b29d08c05610451d7163c7aba48f9b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, suggesting a social engineering lure related to financial information. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=financial+accounting+management+information+system
    • http://files.baresoulyoga.com/uploads/1/3/0/9/130969735/fd6d6bb23a54c.pdf
    • http://files.gonzalescountyfarmbureau.org/uploads/1/3/1/3/131380005/filijawov_wamokinepibuk.pdf
    • http://files.goldendayfarms.com/uploads/1/3/0/8/130873846/derobimaze-pugefozezof.pdf
    • http://files.stowefamilywellness.com/uploads/1/3/0/8/130813645/jasuverimov.pdf
    • http://files.amomentintimeartwork.com/uploads/1/3/2/8/132814958/2395589.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/15935943198.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/liridule.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/20321199911.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/70252754178.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/bumolawarifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevimija.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/xarizivufujixinuxub.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/memivajiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/wimimuketos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/79087244890.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26433336276.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_off00018aae.bin
53b3eea0cb2ea459f05afb08cbb2bfd68550fb308ed78fa1a8d7cb67dfd060f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AAE 5140 bytes
font_01_sfnt_off00019c16.bin
e9cb9cff617cc32fe23623564dd7e10b67fd486ca9d1740abdb7f7583f6aa904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C16 11752 bytes

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