Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5066a86c8501113…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 08:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f04d7ad7e089a096f0fecaecb702a42 SHA-1: dbb7663346a9e9d3d155d8057b8da1486ccf2f0b SHA-256: f5066a86c85011135adf1b44468281b36868ba445ed67449125bae13799c4151
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further 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.club/wix?keyword=po%25C3%25A9sie+la+nouvelle+ann%25C3%25A9e
    • https://static.usrfiles.com/ugd/a2c2bc_0e56dd497be5482c92fa29c1ae564b18.pdf
    • https://static.usrfiles.com/ugd/8de238_37e451fdf9b443aabc0eb17fdc61c96c.pdf
    • https://static.usrfiles.com/ugd/b98abb_c095d44afa2947409fefee7a59d6f4f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cdc3a31f4984d389a8f73a4105bacf2.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_078fc009028b4d9bbf05452a0351efb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ca733eb7ac848cf887eb8202189f8c1.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_f8357e9a674e46f1aab81accee89d7da.pdf
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/majotaranudonope.pdf
    • https://cdn.shopify.com/s/files/1/0431/5371/9453/files/nucleic_acid_metabolism_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/zenufolukepazaxa.pdf
    • https://static.usrfiles.com/ugd/36f25b_53935e81a0264dc1b698f8af620b16cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_46727d6a9e3a44e880657e6f3428764c.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_off00005c08.bin
94e40e84bcad23f0fbdf58a85a92d822d1509fa9b5c46500edddf1c8cb8dcf85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C08 4588 bytes
font_01_sfnt_off00006b5c.bin
5878c4f2973a8ccaf45c0b20efecc57054c16395c6d662befb7afd0fb4d6515d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5C 12556 bytes
font_02_sfnt_off000091ba.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BA 4324 bytes

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