Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3934c1c650c34bb…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 16:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dcb1e4d8f0ee5ce1432c2f119ca4305 SHA-1: db2af8c4b9a2a2b8990d2cf7b5a1570d06349f0f SHA-256: d3934c1c650c34bb5474e9835475978cced69325b0fbb08ebbd68179c042b021
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=holes+anatomy+and+physiology+chapter+1+test'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://static.usrfiles.com/ugd/50c35f_e656dcb2c7f9466fa0fdccb434be0e79.pdf' being the first identified. The document body, though heavily obfuscated, contains the same redirect URL and a list of other URLs, reinforcing the malicious intent of directing users to external, potentially harmful, content.

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.me/wix?keyword=holes+anatomy+and+physiology+chapter+1+test
    • https://static.usrfiles.com/ugd/50c35f_e656dcb2c7f9466fa0fdccb434be0e79.pdf
    • https://static.usrfiles.com/ugd/daca0d_7482f9b064ee4f5aa6f578d08f68bca6.pdf
    • https://static.usrfiles.com/ugd/735189_d36d19e6749c447880720f7aaa0f4f4a.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/annual_report_apple_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/95791465389.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/jawepenigusexutoxolijix.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/4656164349.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/24788443582.pdf
    • https://static.usrfiles.com/ugd/1f5cef_ad087056bc7346f3b01481006ba2a90b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c59f01c313944bd89b6c6d5c60b9c983.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee97749bb1d04e2f90c42d5872c6ea91.pdf
    • https://static.usrfiles.com/ugd/cf14a4_1ba8db35fb8644238f2ad155f61e0e3e.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_off00006708.bin
0078a09d16cdd5b43f884af9624f7fb2f75317127a0ad069b083d5b0186e8c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6708 5604 bytes
font_01_sfnt_off000079f0.bin
26b9d9cb1f8c516d3401e90c9f5813970af79a68f5794bf5852a027c8f2f1f33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F0 10788 bytes

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