Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5e8618557545df…

MALICIOUS

PDF

50.9 KB Created: 2020-07-31 13:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2932bdeb9e9cf6ec55812cabafd2591 SHA-1: 27b707e22619f35d37e2b0ca0e8d252c459c9506 SHA-256: 4e5e8618557545df90f139e4865745d444b2d6c077fca01c4d28c284ce883694
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a link farm with numerous external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'local economic development'. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=definition+of+local+economic+development+pdf
    • http://files.haitiinternationalalliance.org/uploads/1/3/0/8/130873787/7100913.pdf
    • http://files.wraptileny.com/uploads/1/3/1/4/131438161/3223614.pdf
    • http://files.urbanbillionaire.com/uploads/1/3/1/8/131871622/3d28ee73c1.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/vawivosoxulapexazuropi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/logopo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/64162489895.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/gavarifetevejevafufip.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/52933450580.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/38237987225.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8614/files/gawanibomigovutebexibeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/83349830291.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/84274957195.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/11464424818.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/febodixulagumasonaf.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_off00008add.bin
e28f1cc89c65e724ec4526799458a5f4c452ffad1184313e1a771342524c88ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADD 4876 bytes
font_01_sfnt_off00009b67.bin
9f3141d834abf7b4a79ddadde4bc997eb274e4d4811f12061e9cc9e448384869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B67 10144 bytes

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