Malicious PDF — malware analysis report

Static analysis result for SHA-256 def872057b31ad24…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 15:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c11bc7cc7fda763612b94fb6c79bbd SHA-1: f29157104a867aa85edd320d70df6bc022be521c SHA-256: def872057b31ad24d6ac22f70b90139f8db92e4d8648ace64c7a2e216cf0c69a
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=latex+agglutination+test+procedure+pdf'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'wkhtmltopdf', suggesting it was generated by a tool. The primary attack pattern is likely to trick users into visiting the malicious redirector, which could lead to phishing or malware download.

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.com/pify?keyword=latex+agglutination+test+procedure+pdf
    • http://galije.zen-meditation-germany.com/uploads/1/3/1/4/131409090/1425770.pdf
    • http://files.pursanovaaz.com/uploads/1/3/1/1/131164130/4585743.pdf
    • http://files.cotonevineyards.com/uploads/1/3/1/4/131453522/5941920.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/kofefixivem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/maharashtra_budget_2020_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/pisubavefuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/wexumodagoneg.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1599/files/28444181654.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/automatic_irrigation_system_using_arduino_uno.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/realm_grinder_auto_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/viwegelizerewasunexu.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_off00006f07.bin
64a8eaf193c130ba80e6b309e23fcca891e5aaf30f9baa7e83e615b449293b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F07 5332 bytes
font_01_sfnt_off00008148.bin
763de48fdd2e0f9222cc6b2bfa54f719e9f8eb67fa8137eaa53cb38f781a5a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 10008 bytes

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