Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35add7f17a7b824…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 00:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dee6fdae0a1d256752a0857bcc82618 SHA-1: f4d088d8a9fcf091e4d2b3352a24daec5825e364 SHA-256: c35add7f17a7b82422636726cff66a84f72aa876fa080c403ebf1cc2fa7a31fc
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. The primary malicious URL is 'https://ttraff.me/wix?keyword=increase+androgen+receptors+naturall', which is likely used to deliver a second-stage payload. The presence of numerous links to external PDFs suggests a link farm for SEO manipulation or to obscure the malicious redirector.

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.me/wix?keyword=increase+androgen+receptors+naturall
    • https://static.usrfiles.com/ugd/e32576_4140634c3db5484ea591e25cdf020add.pdf
    • https://static.usrfiles.com/ugd/b444d4_72cd94c8c6bc41aaa3f5d03597484e0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f190770c6c074c80a9063f0f03d98476.pdf
    • https://static.usrfiles.com/ugd/455f95_0751951fd6444aa2bd7a52139998de7a.pdf
    • https://static.usrfiles.com/ugd/ce14f3_45ac8403510e46feadcd308bc9060848.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5f0a7616f2c4122a05a0dc4150c0a8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_19d6b2351b174b71a02d7582669cccff.pdf
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/21989928407.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0305/files/32056922288.pdf
    • https://cdn.shopify.com/s/files/1/0430/7619/0361/files/gepukusufoxenudozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/adobe_ifilter.pdf
    • https://static.usrfiles.com/ugd/77d535_bf03861c7dbc4a3cad0e2eba540d09c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_de519511f77a4c08a3ccf7fc9737d993.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bc6a4492a024c3e8a63f388d20d6214.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/
    • https://static.usrfiles.com/ugd/455f95_0751951fd6444aa2bd7a52139998de7a.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b83.bin
7c9323b37d4a7fd692653b4cc34e110bd0d8910f4258a9e4c9887c3a2ecf094f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B83 5180 bytes
font_01_sfnt_off00007d1b.bin
bea6d71458dc85d6fc713e8be9f55fdb9b1c7d22d4dd2d0589269d2d0e781d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1B 10008 bytes

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