Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8ab524797ca5c4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-11 17:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab6ffa4d102dd71cd7141863f6f7b1b5 SHA-1: 3e0d6af69b4648e95a682b69e9f37d99d5401db3 SHA-256: ea8ab524797ca5c44c2cc8db119e20b9e98630cbe409d41367fef028c2411b6e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wb?keyword=social%20etiquette%20rules%20pdf, suggesting a lure to a malicious site disguised as a PDF download. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=social%20etiquette%20rules%20pdf
    • http://files.skeem125photography.com/uploads/1/3/1/3/131383791/e48ae046.pdf
    • http://files.timrowlandbooks.com/uploads/1/3/1/4/131453990/gexitapur_teditetedarom.pdf
    • http://files.carolvoss.com/uploads/1/3/0/7/130738484/keken.pdf
    • http://files.pvzphoto.com/uploads/1/3/1/3/131382395/60e67765d.pdf
    • https://cdn.shopify.com/s/files/1/0437/1002/1787/files/42971512051.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/anatomy_upper_limb_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/japerexofo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/big_book_of_alto_sax_songs.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/42702459219.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/91687172047.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/77744717182.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/dudidesabupivijosegod.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/panomaferagusujapad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/77210506056.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_off00006671.bin
954ded0b6b8ac65b1ea6a1e46f60cd0df2624d7c07a4f397cec0dea46cd29aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6671 5376 bytes
font_01_sfnt_off000078b5.bin
34d0c77a3bab652a87cf72d6cddeacb9e72699c9d70f2765fc8f3dd125467128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B5 10184 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.