Malicious PDF — malware analysis report

Static analysis result for SHA-256 5912cf5ce3cae45e…

MALICIOUS

PDF

40.9 KB Created: 2020-09-08 19:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c46b60e7b01f7dd90d81bac3b60e6d5 SHA-1: 0321a983ce84f6b7a1742a5d7128fe8088230bf0 SHA-256: 5912cf5ce3cae45ed3a77c3f24970dc204722768038c49a7ce5b6cfa527a7e5e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=best+android+tv+show+app'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The primary malicious IOC is the redirector URL, which likely leads to further 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.club/wix?keyword=best+android+tv+show+app
    • https://static.usrfiles.com/ugd/191a6d_28bba4e81b524c4f865838526331e2b1.pdf
    • https://static.usrfiles.com/ugd/2f7815_6e9c4f1244de4503a9a64a00f6feb304.pdf
    • https://static.usrfiles.com/ugd/7ff653_39d8a428d8974ad59ad30ac1a513ea57.pdf
    • https://static.usrfiles.com/ugd/234f58_fe36bc134c2c4998b746f10c618ea9a1.pdf
    • https://static.usrfiles.com/ugd/dcfb95_ae4aec1fe6da44bea06db65ef99b62c7.pdf
    • https://static.usrfiles.com/ugd/24deb6_95cb0a54cf4841e2a9a25546510bd9ef.pdf
    • https://static.usrfiles.com/ugd/b65acf_16222051870e4d96acd2c496552f382c.pdf
    • https://static.usrfiles.com/ugd/aec2ea_8cf0e9281c494831854df6d7487e1bf9.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/punaguselara.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/lefenitiruligiwabepimaka.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_off0000624d.bin
0655a6b3daca717c4f0cea71571cc045d6e2dae56eaf9d5cf23f128a6367fc57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 5216 bytes
font_01_sfnt_off00007420.bin
e83cf94d1eb6fa2eb23b4a156d9cf40aa43ecaf8388414eea0b164310d824a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7420 10300 bytes

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