Malicious PDF — malware analysis report

Static analysis result for SHA-256 b923c36411287547…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 06:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 671fb54c7ccad36ece97941d40f33f67 SHA-1: ce81fe09d6595b5e529f73d7bdff7389832ae988 SHA-256: b923c3641128754737ff6b70f75d08685553e980eb43c32c25d45ce613986d88
120 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, specifically pointing to 'https://ttraff.ru/wix?keyword=hyundai+santa+fe+repair+manual'. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection scheme. The primary attack pattern involves luring the user to click the malicious link under the guise of a repair manual.

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/wix?keyword=hyundai+santa+fe+repair+manual
    • https://static.usrfiles.com/ugd/b56239_9d68203860144769898281a8070b0782.pdf
    • https://static.usrfiles.com/ugd/9e53d4_264a139302d245e4a2b21be036986431.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e790fba37084210abe06b280e179b84.pdf
    • https://static.usrfiles.com/ugd/122077_f1765373757a4dab8530c2a45457d513.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/hardy_weinberg_dragon_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/bipisinebuburiroxopogo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/tutorial_solver_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0441/2856/7448/files/41122028169.pdf
    • https://static.usrfiles.com/ugd/1e32c2_3ab11aefe0eb44c1865a80e4200bc7ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_58a4d8aba22841058fb5ae4fc3ea5dc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5256334a210048ee94a97f102978c2ba.pdf
    • https://static.usrfiles.com/ugd/538d67_0e737bcc8011434f800fbecd2cab88ff.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_ab020ba4fe3f465b80a5917d766c73f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bd8a78e42484b0187cfcc6f3640ee6e.pdf
    • https://static.usrfiles.com/ugd/49be48_7fa4aee442104cc89ec5f41bd1bc1c1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f160cccd797b40dc8753f7f406c2e438.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_3a16c351a5084ae1b149604245cda63e.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_off000066f4.bin
94ffe4b41ec1a4eb8c21f3c4a54a4dbcf2b64f5bfa816118a9168913a13f9976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 5248 bytes
font_01_sfnt_off000078b9.bin
ea4d5133bcd0cb8d4e7ab0f86fe71676ac2a5e47008a6f7b71efd8ae8c09fb62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B9 13440 bytes

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