Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ce3f0818ef4464…

MALICIOUS

PDF

47.0 KB Created: 2020-09-01 13:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74adc6b21400077e07feff2cddd5f46c SHA-1: 11c566820eab81deeff6d311295c0f37e4685622 SHA-256: e4ce3f0818ef44647ca0a9d590d5f4954b21c883f2d0c3626cc1d80c5d7b2282
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=easy+brochure+templates+free'. This URL is presented within the document body, disguised as a lure for free brochure templates. 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 or phishing pages.

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=easy+brochure+templates+free
    • https://static.usrfiles.com/ugd/8b2c09_94ed3135d07d46cf9e912e4df99e7b2a.pdf
    • https://static.usrfiles.com/ugd/b77b08_839c452257234a10953b498dff3bbe0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c05975b7ef7d48009a5b7e423293b265.pdf
    • https://static.usrfiles.com/ugd/b8c837_7126a32b991b40a094026de72dcea7e8.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/40073066827.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/amplidyne_generator.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/totadanozalab.pdf
    • https://static.usrfiles.com/ugd/b8c837_68d2c8855b2a4a2b8bc2f4f02c9fc655.pdf
    • https://static.usrfiles.com/ugd/67e251_35eab38cda684128b696302732c8fced.pdf
    • https://static.usrfiles.com/ugd/96768c_eff390aa7f5b453890bfc7863db7a466.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5dd5b56f6ec452c817aecb991107b83.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3902005ac65449fa4739ab3008de5bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dae9b710cb74eef81b00a83a76f1166.pdf
    • https://static.usrfiles.com/ugd/32acb1_4af3879a19c941e79dedca677a4508c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_10ef68244060448abd7ba5d1a41ddbec.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_off00007895.bin
2ceb7a423c4386058f60775e2296786b5c2968d9144c0f1e40dfa87180d8bad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7895 5452 bytes
font_01_sfnt_off00008b00.bin
609c44b7252ae0be73b4fd366cb22fc5684c4e554dbeb60815b9d3f287cc6645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B00 10732 bytes

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