Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7d977d292764a0…

MALICIOUS

PDF

57.2 KB Created: 2020-09-05 22:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e419a1e148fce1eb50ccad10fb7fd09 SHA-1: 7e2b3d26be068176dcd39ef2aad2c22e84ab09e9 SHA-256: ee7d977d292764a052bd4bd45819502c96e8a1f1f3fa2371e35d85412793f3fb
128 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.me/wix?keyword=cash+book+accounting+software+free'. This URL is presented within the document body, disguised as a free accounting software download. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to Shopify domains hosting other PDFs. The primary malicious IOC is the ttraff.me redirector, which likely leads to a further stage of the attack.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=cash+book+accounting+software+free
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/xamefixavamumilejudex.pdf
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/download_comprehensive_mathematics_textbook_for_senior_secondary_school.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/dishonored_2_guide_gamepressure.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/very_hungry_caterpillar_printable_coloring_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/robapitokapivafipuzola.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/30333143739.pdf
    • https://cdn.shopify.com/s/files/1/0437/7618/0376/files/voli_top_s6.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/90960299506.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8053/files/kesek.pdf
    • https://cdn.shopify.com/s/files/1/0461/6686/8120/files/abandono_escolar_causas_y_consecuencias.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/ipad_write_on_with_stylus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/evensong_service_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/saran.pdf
    • https://cdn.shopify.com/s/files/1/0431/8448/8607/files/vastu_shastra_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0440/2846/1206/files/cystotomy_in_dogs.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_off0000a197.bin
9bfad62303773a4384279c80c7360476f8f140f12d41ec6373b636112f19465f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA197 5312 bytes
font_01_sfnt_off0000b3ba.bin
09598bd88ea7525fe9e337c20c276c6fb860212b5ec6593e1f5b0ef7b87627e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BA 10528 bytes