Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2389a8beecd0fdc…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 17:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a62e07e5cf942c41aae4a5cf0b19526 SHA-1: 9897e3dbbe59d67f346a9b4720cd0487edf90dcc SHA-256: e2389a8beecd0fdcb0a5067af836419eccfdb07d253669a985d00babff2bcdc0
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=que+es+una+empresa+comercial+segun+autores'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which resolve to 'static.usrfiles.com'. The document body, though heavily obfuscated, also contains the malicious URL, reinforcing the intent to lure users to potentially harmful 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.cc/wix?keyword=que+es+una+empresa+comercial+segun+autores
    • https://static.usrfiles.com/ugd/b8c837_3a5d1e81f406449aa9cbf9595a2968db.pdf
    • https://static.usrfiles.com/ugd/b8c837_563ef579b87e4ea78e66c61171fa8f0f.pdf
    • https://static.usrfiles.com/ugd/8b2c09_c7df809c25b148f1b41815448c59cb15.pdf
    • https://static.usrfiles.com/ugd/b8c837_bde519b93aa7410cbf80b3194cbfbfd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_531afa0bf6e04d9a977a40609040b82a.pdf
    • https://static.usrfiles.com/ugd/b8c837_62820aa7407f4a74aae379d055a23c7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_70ecd7a810a944bd9e73a6ad259d29e1.pdf
    • https://static.usrfiles.com/ugd/9219f8_2f3b49624ade4cd0939f841ef0632ac9.pdf
    • https://static.usrfiles.com/ugd/b8c837_677e6ea9d48e4eefba8bbf93d534c314.pdf
    • https://static.usrfiles.com/ugd/b8c837_03fc07f525374df0bcae17c46697bc14.pdf
    • https://static.usrfiles.com/ugd/5de1df_14caf20d9f46419e90356bc8d9648208.pdf
    • https://static.usrfiles.com/ugd/b8c837_fab259615d8f4c029b38d19872f67ee8.pdf
    • https://static.usrfiles.com/ugd/07625c_030739f956f64b85971db75d8d36ffff.pdf
    • https://static.usrfiles.com/ugd/b58d21_df3e064ea4d046b78be0e3a37838ec94.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bc57fe92d904c698ebd51c6cf7399c4.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
stream_004_off0000706f.bin
3775a7c81899862e07f141d5caf0be24afce4859aa6b1ff13e18bbe1d02701fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x706F 11768 bytes
font_00_sfnt_off00005e78.bin
15140283e38541574445c8d84ad94ee517b9f44c4e9fc7d52977bcb2ad8027a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E78 5316 bytes

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