Malicious PDF — malware analysis report

Static analysis result for SHA-256 e662ccffde07f2e8…

MALICIOUS

PDF

37.2 KB Created: 2020-08-30 22:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 069b6ceace3fba6765cd9876b76e34a8 SHA-1: aed72d78aeaf0e387e71c6d24d85f02a300ab256 SHA-256: e662ccffde07f2e8aae0b6242644eb4e275ef822c6b61e6d93f87c549bacb442
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wix?keyword=kenmore+ultra+fabric+care+dryer+manual. Additionally, a large number of external PDF links were found, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness.

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=kenmore+ultra+fabric+care+dryer+manual
    • https://static.usrfiles.com/ugd/5a1791_e2bd0e215b7a4957bed3d8fd99d5136b.pdf
    • https://static.usrfiles.com/ugd/d17951_1863fe44a2e94f6982c846996b8112ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_301c36b947394c2687d7119b95287eb0.pdf
    • https://static.usrfiles.com/ugd/cdb50c_41171c303f874c758a87c026f9bb4939.pdf
    • https://cdn.shopify.com/s/files/1/0432/7931/9196/files/fagedamapamoxovabotetaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/wordpress_file_upload.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/mowul.pdf
    • https://static.usrfiles.com/ugd/b8c837_8731ca8a8b6c45afb1c21e8d644fb998.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d60dd316c6241669db5fe2968fe1e13.pdf
    • https://static.usrfiles.com/ugd/b8c837_044e78700e9f47cb857e1dc0d1e58284.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/d_d_5e_character_sheet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/vedusiwugabofi.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_off00005324.bin
850308699153470f87268802dd1167b3a97b7e3323b0b1e38e40a0b9d811a90f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5324 5200 bytes
font_01_sfnt_off000064c3.bin
27d5dd8d5c22f33085cfac45e8f5441c9bb4be9002d5d15959d7ffd53d7b60e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C3 10344 bytes

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