Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa939a8e9d070456…

MALICIOUS

PDF

97.5 KB Created: 2020-09-19 08:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c481d2334fa10149ae02e1db166a5dc9 SHA-1: 68f710838a7f0a2163e70883811a3a7408602541 SHA-256: fa939a8e9d0704562d84d747a93ef2af04d1bf3f7c2c2507d5e8648b3e33c554
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=wild+talents+pathfinder'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external PDF links, suggesting a spam or SEO poisoning campaign. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same redirector URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=wild+talents+pathfinder
    • https://a61f0815-f993-4cba-b2dd-f4f9b069a65e.filesusr.com/ugd/a48928_adb1b58ac3164e0f96b601abb2655c31.pdf?index=true
    • https://3c992a4d-0d63-4955-8493-0967362b8cb4.filesusr.com/ugd/f8de3e_4fd1969051aa4d1cace35cfbf4e9b9ad.pdf?index=true
    • https://8c62754b-7f4d-4bf8-afb9-00d50b25f936.filesusr.com/ugd/c88839_03ff5ae318fa4ef4aa21cd112863c621.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0439/3703/8491/files/rolling_stone_top_500_albums_list.pdf
    • https://5dca9283-977a-45fd-8ce5-037d73f4be9b.filesusr.com/ugd/bcb9fd_410ab001aafd44d090ec362f794d586d.pdf?index=true
    • https://ede9379d-bf43-4c09-a343-5c57cb007ba5.filesusr.com/ugd/24853a_9aa431243b0f4e03b2140d9b4a27692b.pdf?index=true
    • https://48a3f92b-9813-4b15-8836-dc07eb01ae04.filesusr.com/ugd/418e76_5192cf94f57144c588a28153fe44df83.pdf?index=true
    • https://042f8d23-1e9d-460c-a2fb-2f99defeb5de.filesusr.com/ugd/24d943_c2c8ad51a1404c5fbf91f4f881d94569.pdf?index=true
    • https://bafa42cb-b002-4651-bb3e-07ceebd540cd.filesusr.com/ugd/110ef3_c5e3b7a37ab847afa4c6f12d103e0c35.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/9073/0405/files/sapatuwoveg.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/wereze.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/plant_cell_organelles_and_structures_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7049/files/32444563089.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/wezutitatawugopunosotaj.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_off00014541.bin
3a0e4eb8e4e5b1170acccd956635bdeb27a30a65018dafad8cd20370073c9ac7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14541 5144 bytes
font_01_sfnt_off000156c6.bin
617997379ad8ca2e9b1b98db32d555184d7811bf1585a656342c81e0295323dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x156C6 10000 bytes