Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e4d41b4a7083f0…

MALICIOUS

PDF

48.9 KB Created: 2020-08-30 23:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a1f30718290a0a08cc9969080fc9bea SHA-1: cfb8021837d661b192c70450d8e4073524a5f846 SHA-256: 55e4d41b4a7083f01462670797c63a26ea12f957b18e61fef728b54d697b81ad
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/wix?keyword=dios+te+salve+maria+letra. This suggests the document is part of a link farm or SEO poisoning campaign intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/wix?keyword=dios+te+salve+maria+letra
    • https://static.usrfiles.com/ugd/269bb8_1c05375e24674de8b90245032242c359.pdf
    • https://static.usrfiles.com/ugd/b8c837_0059d019dd9447f2a0ece78b553d13f6.pdf
    • https://static.usrfiles.com/ugd/ac72e0_b2a155673b454b76b2755ea0683cbdcc.pdf
    • https://static.usrfiles.com/ugd/f46427_8c32bb1b66fc46558e745fe2eb6e7720.pdf
    • https://static.usrfiles.com/ugd/5be868_c05fd1d2cb8246719d5cf6c1aa7050d3.pdf
    • https://cdn.shopify.com/s/files/1/0436/5484/0485/files/45735054334.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/the_five_elements_of_effective_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/50077695971.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/poligadijaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/9604/7783/files/13713449228.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f6efb5891d44ca0b4e97c0a94d21fcd.pdf
    • https://static.usrfiles.com/ugd/b58d21_f60a690bd611474d9ee9fa906b72b7a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a2c7ab771be4782bb82ef33e6564db6.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_22ff81a5f7214e90a1e4ada3cc011ca3.pdf
    • https://static.usrfiles.com/ugd/b8c837_356757b73cb642b19deb0bff8ac64bd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ec49a0ee4824ad0905838b2e0b8662a.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_off000077c8.bin
276fb5a47a4643bc82f95b219534c20a54f8aedb1ced7ef7074a50e2a6851a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 4892 bytes
font_01_sfnt_off00008856.bin
8545a04b687d700ae9f145e9f5bc4c500063f3600d747ddfbd64005a802a3196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8856 15700 bytes

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