Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6c74a83be0c265…

MALICIOUS

PDF

36.1 KB Created: 2020-08-30 19:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5762b477ddc1c182cdd0c91a93708859 SHA-1: 3d4217414341c6bf79ed88f3f302d471aa448f9f SHA-256: ba6c74a83be0c265a2ad62cc72015331c521bec947963cafdfee51224700b904
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=download+script+diamond+ff'. The document body, though heavily obfuscated, contains this URL and appears to be a lure for a 'download script'. The presence of a link farm further suggests an attempt to distribute malicious content or SEO poisoning.

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.com/wix?keyword=download+script+diamond+ff
    • https://static.usrfiles.com/ugd/b8c837_eb9876d583ea456987adf47b8f296258.pdf
    • https://static.usrfiles.com/ugd/b8c837_7164653375814b81ac3ed7067aff12c3.pdf
    • https://static.usrfiles.com/ugd/38bf1f_6b9b1dd75cd0429d8bf9f7ebcc5283a7.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_f30c0ad6868945208f87fc231b6bb506.pdf
    • https://static.usrfiles.com/ugd/a4e402_81cf0b01dc9748d2b50e6825c1981ece.pdf
    • https://static.usrfiles.com/ugd/72b0e7_110156fca91d4a24b982f8fff0234e11.pdf
    • https://static.usrfiles.com/ugd/b8c837_903ed052b9164704967317d2aaf1eb30.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/javascript_count_characters_in_string.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/double_column_cash_book_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/62419441305.pdf
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/skyrim_special_edition_save_cleaner.pdf
    • https://static.usrfiles.com/ugd/48f461_9d228ab624584ec6b976e6c24337954b.pdf
    • https://static.usrfiles.com/ugd/d43733_9f9a1a1c631744e1b3e7aaf2b98b95fd.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_off000050b1.bin
1db8076bde384ed9bbd2490d8af55aae78cdf399af574a63e5905426ec012d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50B1 5392 bytes
font_01_sfnt_off00006301.bin
76352d95330d49b46f8be8f3fac7d5e894782aaa1229cf4111d20e8d14f5a9f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 9744 bytes

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