Malicious PDF — malware analysis report

Static analysis result for SHA-256 2858fa03428235f6…

MALICIOUS

PDF

48.9 KB Created: 2020-08-30 15:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94ddd45a3b0e3c01a4c5484c04a07671 SHA-1: 910f72e93484d65c196131a276d5f07886f280a3 SHA-256: 2858fa03428235f6c69f18e1c13f783787208e4aea43c09adf482d8893fc981c
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=the+damned+human+race'. It also exhibits characteristics of a PDF link farm, with numerous embedded links. The document body, though heavily obfuscated, contains the same malicious URL and other Shopify URLs, suggesting a lure to external content. No scripts were extracted from this sample.

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=the+damned+human+race
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/36332005023.pdf
    • https://cdn.shopify.com/s/files/1/0449/7945/4111/files/sql_join_queries_examples_with_solution.pdf
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/example_of_final_year_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/44595732524.pdf
    • https://static.usrfiles.com/ugd/b8c837_b19415cbbbb84587b00bd428bcd33622.pdf
    • https://static.usrfiles.com/ugd/a382ee_0484c9a5f2214f9c9981a3cc8e9e1aa0.pdf
    • https://static.usrfiles.com/ugd/b8c837_04441d11a284475b909021614dadf60f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c064f48203fc4112bd9e96fab972b9f6.pdf
    • https://static.usrfiles.com/ugd/89c6ad_8b567c9728c84205bdaa855a31a384cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_86fce33d88d24af9b0187d99524497b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_45a2e0854b5641fba2cdaac8bd7316d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_46ffed815959402a96d0ae1f5e3eee2a.pdf
    • https://static.usrfiles.com/ugd/735189_752a4897134b44a79b25f0ed2b183d2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2dd31e295c840e3af053e1176413e6c.pdf
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/60819109333.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/96799703661.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_off000081e2.bin
236a9575b2a51aa2f4078af79bde0088196974f58eda11a561ad071516b5d9ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E2 4920 bytes
font_01_sfnt_off00009270.bin
150cdcf10cb7e661cca1053d84edeedfc321c3f00ddb60b1f9f5e0b49db39059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9270 10588 bytes

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