Malicious PDF — malware analysis report

Static analysis result for SHA-256 4624dbaa2c6328fd…

MALICIOUS

PDF

42.2 KB Created: 2020-08-29 10:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98cda4330edb2d5c24b9a3e4412a0763 SHA-1: 3552e6c03bea747e39470764b023bb0b96035f87 SHA-256: 4624dbaa2c6328fda79edfa3bdbebd5720480b011fe5747e0aadd9d2024bd488
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a high number of external links, many of which point to a redirector. One of the embedded URLs, https://ttraff.club/wix?keyword=benedict+s+test+colors, is identified as a malicious redirector. The document body appears to be corrupted or obfuscated, but the presence of numerous links suggests a strategy to either distribute malicious content or manipulate search engine rankings.

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.club/wix?keyword=benedict+s+test+colors
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/23505935910.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/modified_bromage_scale.pdf
    • https://cdn.shopify.com/s/files/1/0432/8839/5936/files/zajevi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8480/8346/files/vubimelodagoxizukejap.pdf
    • https://static.usrfiles.com/ugd/b8c837_a04519cd42ae4f959c5db42a25157745.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e92fb60ed864ab5a96120212c2eb62c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a920866a8e33486899fdeb664e02dd8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1ae8f343bd748f196de2dd10a9b0603.pdf
    • https://static.usrfiles.com/ugd/b8c837_6477cf545f694567a7980cc4a6bc81e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb6451e830434a869b0256e0a060551a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8fce1de2eb24df3b3711f40fff9cc48.pdf
    • https://static.usrfiles.com/ugd/b8c837_7007b2bdd1ef45e0a6831b530c89963a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b5fbe4786ef4768a4884f1ebd64282f.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_off00006989.bin
0d4a56df4210c60e02fd6ab31f9726248bb72481365a92e84665ee60346aa293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6989 4772 bytes
font_01_sfnt_off000079c6.bin
075eed4baf7adfde2f5775aa3ddc89be3fa47b01b5b3fd37c76e5301dee3e870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C6 10044 bytes

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