Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5877bd3ac056312…

MALICIOUS

PDF

36.4 KB Created: 2020-08-31 17:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8302c00ed6882ebfdac10fb5f2bdc443 SHA-1: a79c8d189a8f2b1ecb48609ec78c2dccb601246e SHA-256: c5877bd3ac056312bbad1a6d7768678631ac370b04711a2290a4f1edabc8f0e2
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, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains a URL that matches this redirector. This suggests the PDF is designed to trick users into clicking the link, likely to lead them to a malicious site for further exploitation or phishing.

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=wordscapes+answers+level+887
    • https://static.usrfiles.com/ugd/98857b_3589f6b2878e4683b6fef4644b149fca.pdf
    • https://static.usrfiles.com/ugd/b7306e_455fbd9c8d574b059aa1c9870364ed77.pdf
    • https://static.usrfiles.com/ugd/b8c837_19eb905ce2e84e5c9984de8a8255a2fc.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/koraresuwolalaxodikur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/lamborghini_wedding_performance_couple_dance.pdf
    • https://static.usrfiles.com/ugd/a48928_c5d95c3e7d104c75bec62bba4da39404.pdf
    • https://static.usrfiles.com/ugd/79e5df_cb7f8e376fc247dfbc27e8f80d2221db.pdf
    • https://static.usrfiles.com/ugd/2c8d66_a23cf5b24bc546b9a382c6e597f4efc4.pdf
    • https://static.usrfiles.com/ugd/83b1b3_6f1ee27274894010a8506dbac83902c1.pdf
    • https://static.usrfiles.com/ugd/a91264_2e84f178f808402ebfc0c18fb5b830ff.pdf
    • https://static.usrfiles.com/ugd/5b5da7_2fe0f94b143e4bc5a5983188ae9579f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f28a05ff4c6c4d01bcfd70be4c980071.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_off00004fed.bin
f49906d8f65cf7abe0255e5f86916fe16b9f8cb8ed78ca9ce47e4851b57013b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FED 5504 bytes
font_01_sfnt_off000062d3.bin
183b553ff6dc01ab5dcc94800f45c617acc20f44caa99bd458428512f8ed41c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 10044 bytes

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