Malicious PDF — malware analysis report

Static analysis result for SHA-256 c016f8dc1296c834…

MALICIOUS

PDF

43.3 KB Created: 2020-08-07 03:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84a652d15dc66f9a118193fe5f997380 SHA-1: fa11a58da7c5c139a5bf16a4365545e9ccdc18fe SHA-256: c016f8dc1296c834e6c25b6d3d63bb53ebf501352918e3fa3f070a23ef2dd821
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm. One critical heuristic firing indicates a PDF redirector link to 'ttraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains references to the 'anger management exercises for adults pdf' keyword and the 'wkhtmltopdf' application, suggesting a lure. The primary attack pattern involves redirecting users to malicious sites through 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=anger+management+exercises+for+adults+pdf
    • http://files.grcrowfamily.com/uploads/1/3/1/0/131070190/3426f7e.pdf
    • http://files.hqrecordingstudio.com/uploads/1/3/1/4/131437924/aa6751fb.pdf
    • http://dololok.southcoastsporthorses.com/uploads/1/3/1/3/131379732/18c9230af6.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52244446143.pdf
    • https://cdn.shopify.com/s/files/1/0438/2277/6480/files/potozipemizadudaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/graph_algorithms_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7746/files/windows_mediea_player_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/gungeon_turbo_mode.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/17024179846.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/wegovit.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/kabikatunalolifixelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/85532195127.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/exercise_program_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/72023886829.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/gagepajubebop.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/image_10._0_treadmill.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_off00006a73.bin
afdf1f576427528f6fcd52126f9f114070e72bada456614886a20137a9bcb79c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A73 5532 bytes
font_01_sfnt_off00007d39.bin
335b0e69102545ec06a34267870e70c582f2fd4db672034232baf45d04824534
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D39 10120 bytes