Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6677eeba4c4085…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 09:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d1900162941fd87a9bb80047bc19d0d SHA-1: aa830026918d32b1130464fb746eea94cdd3cce3 SHA-256: bf6677eeba4c408555a54404ca7e72d391992509725b3adbc119c598ba5403c6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a tactic often used in SEO link farms to manipulate search engine rankings or to distribute malicious content. One of the embedded URLs, 'https://ttraff.ru/wix?keyword=immanuel+kant+was+ist+aufkl%25C3%25A4rung+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to academic content, likely as a lure to encourage clicks on the malicious 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/wix?keyword=immanuel+kant+was+ist+aufkl%25C3%25A4rung+pdf
    • https://static.usrfiles.com/ugd/a4e402_55cf6bfdf3ba4b248708e48a96ae25d1.pdf
    • https://static.usrfiles.com/ugd/76156b_678e9ecbd51a49848cd98c32be1842e8.pdf
    • https://static.usrfiles.com/ugd/f65175_3072cd3ab6bb49c1b6cd1c80a669818a.pdf
    • https://static.usrfiles.com/ugd/9a242c_71323a15bc8d443e8a1546795f35d880.pdf
    • https://static.usrfiles.com/ugd/b910ae_96d189107c8a456e84706da3a4cff0e1.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/durirosofapudenusajuval.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/kilus.pdf
    • https://static.usrfiles.com/ugd/99a8f2_bfd761607cab4c65b437deb63de5b776.pdf
    • https://static.usrfiles.com/ugd/c3f88d_2763eaf513514439abb18d6ea0def167.pdf
    • https://static.usrfiles.com/ugd/e2c250_ad9af8a4ceeb4ff2b09553e19de41373.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60f0e16c4c7435696cc43e21fbc263b.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_off000063a9.bin
7ea2a8b61e1dabab5c4ac1960166d216fb4cf6aacf61ef755abd090dd85b6f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 5692 bytes
font_01_sfnt_off00007673.bin
9c88ad173b12639b37d5eed8ef2b2f2523d64e1bbaded027e3df925315d55579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 11064 bytes

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