Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84e9dd47dc2cffe…

MALICIOUS

PDF

37.2 KB Created: 2020-08-29 15:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3efb184e13ef4c2894b4003c2602aaba SHA-1: e2a6cc364926265695e1c8331747dcdaed2565c4 SHA-256: a84e9dd47dc2cffe2fb29de50202ba3301a9f44deb0a789dc3befd1f60a40d98
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, directing users to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. No scripts were extracted from this sample.

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=air+transportation+a+management+perspective+8e
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/45480640812.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7248/files/25530650654.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/11503650224.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1586/files/xobozufatagejuzetenom.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/car_payment_agreement_letter.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0c90cec36e9447080397cc238479b82.pdf
    • https://cdn.shopify.com/s/files/1/0432/8603/6646/files/kepulovojupulitava.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/antifungal_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/97195823272.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/6604236561.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/fidukiluki.pdf
    • https://static.usrfiles.com/ugd/2c8d66_641ad4b625da4de1ab8062d07af796e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a30388abdfd24672a16a5c465e37949b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddcf71396a3c463a99180d85e72960ff.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_off00005404.bin
7f4032573399db9a2b6a6541161716f194a36ed806de136a3369f1493f2e7d90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5404 5464 bytes
font_01_sfnt_off00006680.bin
f06c86247249188748488cda4ad4e23b121fc13c89c29e714268c720d9924922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 9788 bytes

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