Malicious PDF — malware analysis report

Static analysis result for SHA-256 847b975c39af79e9…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 10:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f3968cf1cf7a95acabd72a87038f586 SHA-1: 54d7c337c8e5717872b2c40d63ac8b5d1bbcbabf SHA-256: 847b975c39af79e9dbb2ba076049c190cf203ff9eb9943bc259a10c7a8ee3af2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, 'https://ttraff.com/wix?keyword=leyes+de+exponentes+y+radicales', is identified as a malicious redirector. This suggests a link-farming or redirection attack designed to lead users to malicious content.

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/wix?keyword=leyes+de+exponentes+y+radicales
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/21258218970.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/hr_analytics_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0440/2819/9062/files/82360503151.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/zeser.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/zarilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/luligolepiruli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/tatemiwejejukom.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1945/files/4915242099.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/ardea_herodias.pdf
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/maths_book_for_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/42443936989.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/27272069167.pdf
    • https://static.usrfiles.com/ugd/625844_8ccac921571c42fbabb584c41db52a07.pdf
    • https://static.usrfiles.com/ugd/cf79db_a506cc0ea2b246b5ab20f1aa842bd01b.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_off00006558.bin
f056a72d6183dc8cae5e215c29f93c0ac3a9c9ca5ffea7eddc91f8a6822ef5ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 5176 bytes
font_01_sfnt_off0000770d.bin
6066b7101ba7be8621f23162c0a5e5409d99aed59415923c67112a6d91177fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770D 11040 bytes

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