Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ff68d370a7b23a…

MALICIOUS

PDF

65.6 KB Created: 2020-09-01 00:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e4eaee99a61d9b01b52df896ed07db2 SHA-1: 05ac81e2cdce0c3200f2aca17efd4dbfeda178db SHA-256: 19ff68d370a7b23af4f978ce53c310fc6d4705a02c596c1095977b90d06aba7d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, likely to improve search engine ranking for malicious content. The embedded URL https://ttraff.ru/wix?keyword=world+journal+of+emergency+surgery+guidelines is the primary indicator of malicious intent, serving as a redirector to further malicious infrastructure.

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=world+journal+of+emergency+surgery+guidelines
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/icao_aviation_security_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/nivuxigo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/40813223539.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/presente_perfecto_simple_en_ingles_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/8467765545.pdf
    • https://static.usrfiles.com/ugd/b8c837_192c92c0d559484dac893d6c930670a3.pdf
    • https://static.usrfiles.com/ugd/55cc32_fbf3e77092ee427aacb6dc72c2b5c24f.pdf
    • https://static.usrfiles.com/ugd/26481d_997922d406ce4b83ab5316748fcec3b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_07d40035df2a43baafe2e9f9bf9476f1.pdf
    • https://static.usrfiles.com/ugd/dad90e_6310590e936e4814b617fa87c100c746.pdf
    • https://static.usrfiles.com/ugd/b8c837_9442942980d449109f7e8df780c43b35.pdf
    • https://static.usrfiles.com/ugd/2f7815_37b6754ac3224519bb4ce98c2e978899.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_1c2b871c6606460ea91ff7f110a702e8.pdf
    • https://static.usrfiles.com/ugd/ac72e0_7373f5dc77264676812fcd05096167e0.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_off0000bcfa.bin
4b6b623c6a337f3d330ffd3d6111e2b5fa833f03f563fa7278692739ead83fb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFA 5532 bytes
font_01_sfnt_off0000cfd0.bin
9e5af6efb93693a2f6e58863dd8e08ace591adf8109b88559023d3670eee8c69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD0 13044 bytes

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