Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc28bf4dd15f5ddd…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 04:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 487ed3fda9cb6c3e9c758a920c545341 SHA-1: 7388cb2d8f880abf0ed34e60fdccecff3e0d5e39 SHA-256: cc28bf4dd15f5ddd73443cece22f5fd0f4a705e5c0621b132a24219cba503343
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.link/wix?keyword=forrest+gump+symbolism', is flagged as pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The primary goal appears to be directing users to potentially harmful content through a link farm.

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.link/wix?keyword=forrest+gump+symbolism
    • https://static.usrfiles.com/ugd/6da380_32ea22b7534f4f09be6569cd6899489b.pdf
    • https://static.usrfiles.com/ugd/b914b5_50a30394aaeb4aca8a73b402e5e4b2e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8c1b7c2300c4639b99ccf2f4fdb7625.pdf
    • https://cdn.shopify.com/s/files/1/0428/9072/3487/files/40983451026.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/bcg_matrix_ppt_template.pdf
    • https://cdn.shopify.com/s/files/1/0461/9593/3347/files/formula_for_volume_of_a_square_pyram.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/vesodonifekime.pdf
    • https://cdn.shopify.com/s/files/1/0440/3177/0789/files/40649841607.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/62679902982.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/sickle_cell_anemia_punnett_square_worksheet.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_off00006020.bin
c011d4dd0cfe73aab57b626bb19e400048917fa120074959482d80168fbd4e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 5128 bytes
font_01_sfnt_off0000718a.bin
97b7cc7f3f46cfbaefd83f10a3ee16d0ed1bbbed69cb4ffcf4ad30bc5e7021a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718A 10252 bytes

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