Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ab17d87325e8e8…

MALICIOUS

PDF

42.1 KB Created: 2020-08-12 14:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff1c31f91c78871e34b0e2f00325fe58 SHA-1: 7bdc8c690456c9f58746c42cbc6e9fabbc99a7ba SHA-256: e2ab17d87325e8e8a8b11b980dc95074b9f8f936d5092a1ac673fd19e69c2bd1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'formula of mathematics pdf' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to malicious infrastructure via these embedded 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=formula+of+mathematics+pdf
    • http://files.nfatuated.com/uploads/1/3/0/8/130814245/3e7c06535.pdf
    • http://files.northstateayurveda.com/uploads/1/3/0/8/130813846/jebomazozu-nedutil-gobex-subofuxu.pdf
    • http://jujop.shcgiftshopgrabngo.com/uploads/1/3/2/3/132303382/9974225.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/vilagajut.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/bamboo_flute_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/petawawajuxejosuko.pdf
    • https://cdn.shopify.com/s/files/1/0448/1702/3138/files/handbook_of_garments_manufacturing_technology.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/gevotozebamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/4035141129.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/87170606845.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/mazijopedirafofefodu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5143/1574/files/simon_sinek_find_your_why_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/sipifuvexadanarologotenu.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_off00006848.bin
ea401392fe2bd196c2250e46a6c44693617c960875c6d2921493463795b86561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6848 5352 bytes
font_01_sfnt_off00007a52.bin
96174c63bf199d3428b9982df84cec4fd0abf978d7b351adca11a81583ff6d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A52 9648 bytes

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