Malicious PDF — malware analysis report

Static analysis result for SHA-256 edce1b221d605f64…

MALICIOUS

PDF

50.8 KB Created: 2020-09-02 00:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 698ff5fb04c3160ab501547fc6137493 SHA-1: 3f183c89a424ad62cfcb3233e93667392563a743 SHA-256: edce1b221d605f641dcbcc1e88b3dbbd36cab42cf61f7e2f6dde7fb634fdc66a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with the promise of free party invitations. The document body, though heavily obfuscated, contains text related to party invitations and the redirector URL. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents, likely to improve search engine ranking and distribute malicious links.

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=party+invitations+free+templates
    • https://static.usrfiles.com/ugd/ac51ce_cbff995978ef4910badcf398f4b294ea.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_c72cd927127b452a87d5a80d6fa9c10c.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_2a9982e0c2fa4584b7b06a0151f6059c.pdf
    • https://static.usrfiles.com/ugd/b8c837_60555049390642529381efb17e044f90.pdf
    • https://static.usrfiles.com/ugd/0c4177_e6e99241a05f4795b061286829f1c716.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee9db509fe3b41b8b98ae1688667e26e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ee47d256e764390bb80a568278c3939.pdf
    • https://static.usrfiles.com/ugd/c75f60_1449304b5a794f24a2579ac0c8cc8af4.pdf
    • https://cdn.shopify.com/s/files/1/0433/5403/0231/files/33138299977.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/kipipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/jspdf_html_to_angular.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_off00007f93.bin
30f40d40a31d1545ad912a78db9e1e49a9dd71c29e283d785b79821dc7b3d193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F93 5208 bytes
font_01_sfnt_off00009142.bin
b927a3adebd6c1c87d7b3af7b42c6e853673f3c3347c478271690e78825e1ce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9142 14576 bytes

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