Malicious PDF — malware analysis report

Static analysis result for SHA-256 57794130d643026e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 22:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cb4f8e9d7f698ea7d3a71dc23bb560e SHA-1: 49e9d3ae083f45650ce49808024a409b9c496af4 SHA-256: 57794130d643026e1bd03fb2c080920e246ed15584a07cee6e5305c29a470167
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, a technique often used in SEO poisoning or link farm attacks. One of the primary links, 'https://ttraff.ru/pify?keyword=capit%25C3%25A3es+da+areia+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references to other PDF files, reinforcing the link farm strategy. The intent appears to be to redirect users to malicious content through a chain of links.

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/pify?keyword=capit%25C3%25A3es+da+areia+pdf
    • https://static.usrfiles.com/ugd/39cb9d_4ba349b5130a414bba44593176cd46d9.pdf
    • https://static.usrfiles.com/ugd/a4e402_c16d0472877a4dc09fb840b285f69bdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1107cff6c33844f5a82bf5b9e8e08998.pdf
    • https://static.usrfiles.com/ugd/6203b9_c0521718aa9549738ef94e0abfe85a9c.pdf
    • https://static.usrfiles.com/ugd/6cfc61_d9496039608d47ab980da1f0c5fca8a2.pdf
    • https://static.usrfiles.com/ugd/34ec99_64a8f8b3779043a78cb22aa05621af1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_18b4dcb7af6a4cc18f8d0f2ff2453413.pdf
    • https://cdn.shopify.com/s/files/1/0437/3040/3477/files/lujakisegukovelakewenemuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/inorganic_chemistry_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0432/9141/0596/files/libodabodenemovata.pdf
    • https://cdn.shopify.com/s/files/1/0450/9233/9877/files/articles_on_educational_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/sorting_algorithms_in_data_structures_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/xozususojusadoludifi.pdf
    • https://cdn.shopify.com/s/files/1/0454/6284/7640/files/63396520688.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/xofometanaveni.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_off00006221.bin
c75bdf75d896b35e104a63fed855378cb6bf05b5e8d8c1585b93e7b9c9130e03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 5228 bytes
font_01_sfnt_off0000735d.bin
854a6953f4df7272f5b5ac6de267aac2447cd3bf9eae7031cef82cc7b0c2582b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735D 12184 bytes

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