Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea696be1ad8ece5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-29 16:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65bc2981b7801a26f4597c8149660358 SHA-1: a620c6aea6569eb58b66e066b85e60a05df71a05 SHA-256: 7ea696be1ad8ece59bf81ff0674a408465cd453c6af1d618ef23fa0eb7a08c44
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 link farm hosted on static.usrfiles.com. One of the primary links, however, directs to ttraff.com, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the URL that is also flagged as malicious, suggesting the document's purpose is to redirect users to malicious infrastructure. No scripts were extracted, limiting the analysis of further malicious behavior.

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.com/wix?keyword=is+texting+killing+the+english+langu
    • https://static.usrfiles.com/ugd/b8c837_b549305a9099462bad9dae07b5a0bec4.pdf
    • https://static.usrfiles.com/ugd/7598fa_21ee97cf950e44a5b938b3dd768b55b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab96afde982e44ff8247b25864394a6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d338ef3bfea54650b258c3a3c51d4b70.pdf
    • https://static.usrfiles.com/ugd/b8c837_92bea7a586fd4e00a08e629d2fab10a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_df7deea3c11b460f83a3eadf210e7071.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae87d4803963406e8ddc21f43e6480d0.pdf
    • https://static.usrfiles.com/ugd/80c1db_3cc13d15845d4f6e922aaa1dbb9f5eb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f26783c5898343659938d719a5737507.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe89ea9fbae94729b8945e3964f4c58b.pdf
    • https://static.usrfiles.com/ugd/95089d_a7625a2231404b3eb11bbf0f53a5966e.pdf
    • https://static.usrfiles.com/ugd/b8c837_8851dfdb54e04661ba2ea098443a24b2.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_off00006509.bin
8debe848a9b623028721d8dee609fcc5b9fa34ddc2382971d0cf0129292020ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6509 4920 bytes
font_01_sfnt_off000075c5.bin
20c08d8fac895f3f69cc2bf6b681096d54e86191e4ccd1b2e30bd1707762c0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C5 10120 bytes

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