Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33267ca36034d5c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 02:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7946c59134ad9e7cde19de1b660f42f1 SHA-1: 11440fa502966a2fa12965a6df25539098528013 SHA-256: c33267ca36034d5cb5efab7000c10df953df1e49fe2e469d051936c0dee18f36
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=strong+curves+bret+contreras+pdf', which is likely intended to lead the user to malicious content. The presence of a link farm further suggests an attempt to manipulate search engine results or distribute malicious links.

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/wix?keyword=strong+curves+bret+contreras+pdf
    • https://static.usrfiles.com/ugd/b8c837_ad796a46abf149ef8058e49501923ca8.pdf
    • https://static.usrfiles.com/ugd/fb83f1_9aa3059089064741bdf0aba12e0d6797.pdf
    • https://static.usrfiles.com/ugd/455f95_29c005a4940b44b08d964992f70171a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e91c8ffad224240b9b6ae6b2fc36491.pdf
    • https://static.usrfiles.com/ugd/db1da1_fd1837e5160e4192a2e98e22d95b8660.pdf
    • https://static.usrfiles.com/ugd/a382ee_fdeb869e7913450b865f0777dcb5ea78.pdf
    • https://static.usrfiles.com/ugd/03ae60_cfcd3b4840ad4b72bd186b8b25a0d90f.pdf
    • https://static.usrfiles.com/ugd/6da380_f2d14ee4a8f648e7bd88991a51c7152d.pdf
    • https://cdn.shopify.com/s/files/1/0434/5462/7993/files/21345407823.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/jee_main_2020_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_33e1cc63d4504eafa87113d5abcd29bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_db409db4f6a241769f915350bc4ae4e7.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_off00006902.bin
a8bdf0bea3fd3d60270da0bfb5faa9ae7810d0a6a62fb55ac12b64460ce082fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 5596 bytes
font_01_sfnt_off00007c17.bin
1cf4d726dd4f7b57c06fc1b56d7da31e728cb15fe8cfd7e836a36b605b2128fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C17 10436 bytes

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