Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04d4502b0d904f4…

MALICIOUS

PDF

34.9 KB Created: 2020-08-30 03:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66b9f549b6946801dce35da49bf2cf3e SHA-1: 652542b88dcf8c93efa625d6d9da7403f220386b SHA-256: e04d4502b0d904f430c5cbcd2cac316f605700904fe8a087bd05e22eed7ad1ac
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is disguised as a piano sheet music PDF. The document body, though heavily obfuscated, contains the same URL and references to PDF files, reinforcing the lure. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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.ru/wix?keyword=peace+in+the+valley+piano+sheet+music+pdf
    • https://static.usrfiles.com/ugd/7baf93_40d6c319b0fe4732a9338560201b75a2.pdf
    • https://static.usrfiles.com/ugd/913720_473c060b9bb74bb8bf544e6819bff594.pdf
    • https://static.usrfiles.com/ugd/73cb9e_ea6a0dfb2aa746f681055f85b7e444e0.pdf
    • https://static.usrfiles.com/ugd/0d002d_1ef4c68a55f346f4858930992e72da0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ad87bbb5ac45b1b7a6d1efa8027d16.pdf
    • https://static.usrfiles.com/ugd/b8c837_05a263a724ad4646896366ea5eb67207.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_93183750501c47a895cb1df018a3b3e1.pdf
    • https://static.usrfiles.com/ugd/87b9a8_525dbeffebdb48cbb782008e948e8839.pdf
    • https://static.usrfiles.com/ugd/a43ec6_20e4ead2d63d41eb841d98642586563a.pdf
    • https://static.usrfiles.com/ugd/cd79e3_5f469d9df2da4c8c97809044a381f93c.pdf
    • https://static.usrfiles.com/ugd/429b25_8849ae3afe2d4fd695ed7bd23c51b56d.pdf
    • https://static.usrfiles.com/ugd/39cb9d_85241a27b66a413289ef70373d810a64.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4501/files/91071853137.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/zapux.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/49598823097.pdf
    • https://cdn.shopify.com/s/files/1/0439/4981/8024/files/temopexizimus.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_off00004826.bin
3d2ae82b4ce653dae93b2781f0add6156d4200addc10478192b3b8eba916cf04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4826 5460 bytes
font_01_sfnt_off00005a9e.bin
127a7e0a34d16409d303c3f0f5d14db9b02d5bb18dd810e46b9901e66abee4ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9E 10536 bytes

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