Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ef691cef47e55e…

MALICIOUS

PDF

48.1 KB Created: 2020-08-29 20:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b8f0b953bf55fd7af0fa6eceec3f939 SHA-1: 9642781b1c911f8f3d22435ab04aa72feb5b7c44 SHA-256: f1ef691cef47e55e6bfb5ea9747282725bd880d921c1027c67f0a9df0341d998
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a redirector service. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.link', indicating malicious intent. The PDF_SEO_LINK_FARM heuristic further supports this by identifying a mass external PDF link farm. The document body contains garbled text but includes the suspicious URL, suggesting a lure to external content.

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=subaru+impreza+hatchback
    • https://cdn.shopify.com/s/files/1/0434/1684/6488/files/24888476466.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/adverbs_of_frequency_exercises_primary.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/22070173001.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2c7ec019d1240dc8bf1d6f825b46b2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0d1465147984e98a0fc0aa581cad539.pdf
    • https://static.usrfiles.com/ugd/b8c837_abffd63dda0b4bf8ad2058abcf4aeb5a.pdf
    • https://static.usrfiles.com/ugd/8b97dd_03c62332808a45fd85187f5d67fffeb5.pdf
    • https://static.usrfiles.com/ugd/9cc572_a6853cf341a84be8b7f293233ecbbad9.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb2c15093a80485a9d851f595bd3b2e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_bde198de5d0b4ac3926ff7a233862e2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_17b5f2711fc1485a82590df0ac64dc8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1669f77a8efc4cfb815a8570660e00f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dedc56197484533b1324d7af58c9926.pdf
    • https://static.usrfiles.com/ugd/b8c837_f26ee052378b49ab8788594b0c1bd47c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f2b8e7dab6147c78548b4e5b26f0096.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_off000070c9.bin
28a95e3f963b7222b0a371c91e8b26f1f9120fc981773c58baa050aa06b4a078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C9 4988 bytes
font_01_sfnt_off000081c2.bin
eb5e04974197ba5ca89f44b6e1d662839d74dac36e638b651275ae4220370ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C2 10308 bytes
font_02_sfnt_off0000a4ff.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FF 4324 bytes

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