Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3ed5c2b0a02010…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 09:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cae753f9e4a324c451ad99475ad4e87 SHA-1: 15adf7d9d28621d86d4c7f77f414fb1e399a5833 SHA-256: af3ed5c2b0a0201098480a64acb52a88706094dd8677bb0a6cd001036e6c9ab6
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.cc' domain. The document body, though heavily obfuscated, contains text related to free HTML templates, suggesting a lure to encourage clicks. The presence of numerous external PDF links further supports the 'link farm' heuristic, indicating a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=free+html+templates+for+websites+simple
    • https://static.usrfiles.com/ugd/253000_a99a526c8b194bc888127cc4c480e84b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5d9d772ef3049d38fbfb0259d316877.pdf
    • https://static.usrfiles.com/ugd/40512e_2c4dcb54d4c8444da8b0b21a022d6797.pdf
    • https://static.usrfiles.com/ugd/b8c837_15da4e260a7745cea480e065b662638a.pdf
    • https://static.usrfiles.com/ugd/cb4a18_11bc8658628a4472aab7283f29acf7a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe7949643807437c89404e23c6aef9fe.pdf
    • https://static.usrfiles.com/ugd/06497e_6ae59609a10b4b49bb8b61b1e21d8512.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_17136962e6e2451a9aac38478053373e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e9be0217a2c438ca5ca0ecfe9722218.pdf
    • https://static.usrfiles.com/ugd/55cc32_bfa5bb11d3804ca7a3e6331fb4d9e55f.pdf
    • https://static.usrfiles.com/ugd/5e8de6_8911405025d2449d829cb79b46125ae2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/93900454987.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/53472905891.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fdb.bin
1333d63f1dce029bbd06083b361beabf4bd99fecd160d1ba3624b79215458fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDB 5328 bytes
font_01_sfnt_off000071dd.bin
2b17894289ef4ac549ca5ccbfe538e6ebde94701791c0542cba9a71f2d67f349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 2268 bytes
font_02_sfnt_off00007bf0.bin
8777c171b917cf9cd5c8fa86dbfafa7065948d5f6c6ece0a89c54e3a6854c557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF0 10060 bytes

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