Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6e6bab57db31dc…

MALICIOUS

PDF

53.0 KB Created: 2020-09-02 06:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a80edbd52eb3e5423708dd49207f707 SHA-1: 29acaae6e9b9f43ca6a9c550cc832f5af9e79467 SHA-256: 2c6e6bab57db31dcc80bea1af253f02619cbb2c166646431972184c7270104d7
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a visual download button lure, directing users to a malicious redirector. The primary malicious URL identified is ttraff.ru, which is known to host redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to a medical case report.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=klippel+trenaunay+syndrome+case+report
    • https://static.usrfiles.com/ugd/c1615c_5e93ec90f0cf43c49db94b61c31413cb.pdf
    • https://static.usrfiles.com/ugd/4f270c_461e227c1924449eb46dde311864d36e.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_ce00336ce2554a69892448d6eff8aab2.pdf
    • https://static.usrfiles.com/ugd/1a89c8_43ba8e828de74964a251aeb358e608fa.pdf
    • https://static.usrfiles.com/ugd/2b25b5_63afa5a7991b4433b5da85235088854f.pdf
    • https://static.usrfiles.com/ugd/defcb2_ffdda4325ead4299ae9573650ba13bff.pdf
    • https://static.usrfiles.com/ugd/b5aed9_298c42fd4fd04b44a2046ac4b66ac57d.pdf
    • https://static.usrfiles.com/ugd/c3f59f_93738409c1eb4e67af6324f1a4f0a132.pdf
    • https://static.usrfiles.com/ugd/aef5b7_cce9f1ffa0f3439fb4673e46c0a6b9f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fd49c83dee04e82a9ad8695ef5cdc45.pdf
    • https://static.usrfiles.com/ugd/0a593f_c795c9333ef34919bec5e8fe909e43c1.pdf
    • https://static.usrfiles.com/ugd/943725_094720e4b2e34c80a39f0e9566f609e0.pdf
    • https://static.usrfiles.com/ugd/e2b09b_18c3e099cac64122819bd2e00d535fcb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea5c6f37434c4358935f830292bf100c.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_off0000854c.bin
898a89ac95d9576feb0998975be54a957e6e1518d1506e98fb537df1c8f2ea37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854C 5288 bytes
font_01_sfnt_off0000973f.bin
f5e0bb61b59c675fdff0c4132e3b5959031c7df76b757bd22af57a009218552e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973F 14844 bytes

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