Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ff299b4b86fa0e…

MALICIOUS

PDF

38.7 KB Created: 2020-08-19 05:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c45eb4b285ae7eb2b726f89fdd9b81ce SHA-1: 45952c083bba70d1c532787fe05d2d2ca1aab0bc SHA-256: 26ff299b4b86fa0ef84a8e72dc23e3ec83e0c12769ee25fbc1e2e99d26f217fe
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=2019+cloud+security+report+cybersecurity+insiders', is designed to lure users under the guise of a security report. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=2019+cloud+security+report+cybersecurity+insiders
    • http://refujomuj.leftcursor.com/uploads/1/3/2/6/132681490/d580ceff44454a.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/13468529342.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89853177043.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/86059186755.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/da_5960_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/9321298890.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/55472781540.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4158/files/jenasunipaparevizu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9641/files/10671244925.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/rikigubirolixamowoko.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/64445399686.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4882/files/jukirukixudumoriridubotaj.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_off000058b0.bin
f2f5938617bddf058e9fa5c45716d36cfc158e276573c75cf71475ea44246e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B0 5484 bytes
font_01_sfnt_off00006b59.bin
0e9ff366ac9e74ac66042189bf4fa28fe1000aca57c8e38ce79771d9885b754c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 10204 bytes

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