Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed7cbf34fab8429…

MALICIOUS

PDF

40.0 KB Created: 2020-08-29 13:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2888bbf0f7c4597c0d665e9feafaa5b4 SHA-1: 7e5b7f7d78ae13acc75301a0e7c028554fb1d3f8 SHA-256: bed7cbf34fab84298f9869d8b0d7151c610a0b89144f026c983504e3e09d809b
130 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'Karvy mutual fund nominee form'. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The primary malicious URL is https://ttraff.me/wix?keyword=karvy+mutual+fund+nominee+form, which is likely used to redirect users to further malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

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.me/wix?keyword=karvy+mutual+fund+nominee+form
    • https://static.usrfiles.com/ugd/b8c837_5f200ab4ebdb4b10b98f773635ebf639.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c8f8a7b44464f87a491fe47aa1ed692.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7e58743c2014c5bae040b09d7186fc7.pdf
    • https://cdn.shopify.com/s/files/1/0462/5625/9221/files/24402734225.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/88638696024.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/15652623277.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f4e713ba6c54bd5b425813e8a49d5f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c82fbae4e3694d81b50cfc3da958c002.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cae11349c0f48c1aa905d019fc1a3b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_09b453a9940544f2b6c67044e154fa97.pdf
    • https://static.usrfiles.com/ugd/b8c837_5108e906952e4dbca29928509db2eede.pdf
    • https://static.usrfiles.com/ugd/b8c837_4256e1a6ffbf4d08a811cea1e5adb1dc.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_off00006159.bin
0814d360cca6fc4dc1a7a371128c1873780c812434079d9be9cc1a8061fd1de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 5008 bytes
font_01_sfnt_off00007258.bin
7559b8b071009a64443a7a5325f2f0108e64b0a2de8dd9c196e725339f3464a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7258 9680 bytes

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