Malicious PDF — malware analysis report

Static analysis result for SHA-256 a414dd7a4f9d2f64…

MALICIOUS

PDF

39.2 KB Created: 2020-08-31 15:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8776a624c07f9920326fca2e63916c62 SHA-1: 5f0e42efd18cab86bae9d9c6235c9dc2ef8bf456 SHA-256: a414dd7a4f9d2f64770cf018109451cad5ca510164b5db80fbb20f24579a8bb5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=bokeh+lens+app++for+android', is designed to lure users to a malicious site. The PDF also contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning or to obscure the true malicious destination.

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=bokeh+lens+app++for+android
    • https://cdn.shopify.com/s/files/1/0435/6256/5781/files/aldridge_school_uniform_shop.pdf
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/7684065581.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/89867970761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26160609228.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd57089f5fe94c1fab7ea4dce6b5cb5c.pdf
    • https://static.usrfiles.com/ugd/856cea_551792e9cf7c4dc882d60e371b990166.pdf
    • https://static.usrfiles.com/ugd/7d21c0_321a1671b16f40eeac04c97b3cdc8380.pdf
    • https://static.usrfiles.com/ugd/0d2908_7e28a753925c428baed562ae29a60a0f.pdf
    • https://static.usrfiles.com/ugd/850f07_4cae2e6c3f464c2a8c96e60db6c07507.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fb304e076964a2db177e8e091212e4c.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_off00005ba8.bin
f4eb69d2c9886165dd540adca40b94529dbbcc2f9c19ba9237d24336b1cd5b4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA8 5240 bytes
font_01_sfnt_off00006d79.bin
3047f9fc4666659c5d0c1c658dd02b8d1b2152423089ababd4505ed36c4d12ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D79 10240 bytes

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