Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b739716d8246a27…

MALICIOUS

PDF

38.6 KB Created: 2020-08-31 22:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f31a761fb995e124cb043c1e5bd0121 SHA-1: 831be06d1eb131b069ec5556d5b9fc9f1f58a7b8 SHA-256: 2b739716d8246a273027d444cc994d4460041327be5d07455632ad945eb6656b
120 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, a common technique for distributing malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'https://ttraff.link/wix?keyword=confluence+templates+variables'. The document body, though heavily obfuscated, contains text related to 'Confluence templates variables', likely serving as a lure to entice users to click the malicious link. The presence of numerous other PDF links suggests a link farm or a broad distribution attempt.

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.link/wix?keyword=confluence+templates+variables
    • https://static.usrfiles.com/ugd/9b33c5_4df09aa6f5574962a93ac119d3b04c33.pdf
    • https://static.usrfiles.com/ugd/4b7290_3912eb2130c34eedabca4524df05535f.pdf
    • https://static.usrfiles.com/ugd/b8c837_127b7f64e5fe454c97d8858f93b75350.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf72fc765e04470a8f2e65bb3ff3554b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a10ce090e854ed3947ec2c181d10032.pdf
    • https://cdn.shopify.com/s/files/1/0432/8688/8612/files/tifijakenediwinosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5068/6874/files/bcom_syllabus_mysore_university.pdf
    • https://static.usrfiles.com/ugd/cc10e7_d4ff8b761f784d0abedf9e07c7f2662f.pdf
    • https://static.usrfiles.com/ugd/1cfe37_a918a3ceba3a441a89b6d04e5d20984f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d4996c4c49c4289a8913bc5ffcd4555.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_off00005a0b.bin
b91d452bea0708cf313bdb08ada497235992bed5bcc0e22f9db2d53f6a54fcef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0B 5264 bytes
font_01_sfnt_off00006bdd.bin
93bcb002aa3b819249a571da05f182a3bcfd251f0afcec94b2c86800488183be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDD 10084 bytes

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