Malicious PDF — malware analysis report

Static analysis result for SHA-256 853b8013a9b7730d…

MALICIOUS

PDF

43.2 KB Created: 2020-07-08 23:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c37e99d6fd756643e7e1e21358fc989 SHA-1: 97db05dd08e9644e862c2f659a1e275ac27c8af4 SHA-256: 853b8013a9b7730dee3967f69b03f109c8bced3d47f10f13bc72baa58302bbbe
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, pointing to 'https://ttraff.ru/wb?keyword=eugene%20nida%20the%20theory%20and%20practice%20of%20translation%20pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to external PDF files, including 'http://files.charsrestaurant.com/uploads/1/3/2/6/132680869/1958753.pdf'. The document body, though partially corrupted, contains text related to the academic paper and the malicious URL, suggesting a social engineering lure.

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=eugene%20nida%20the%20theory%20and%20practice%20of%20translation%20pdf
    • http://files.charsrestaurant.com/uploads/1/3/2/6/132680869/1958753.pdf
    • http://files.taichischoolofgentleexercise.com/uploads/1/3/1/3/131397934/67f5de.pdf
    • http://files.breathewithlauren.com/uploads/1/3/1/4/131437351/424db3.pdf
    • http://files.scratchartedinburgh.com/uploads/1/3/0/7/130740458/norefiliguwox.pdf
    • http://files.mackenzieglobal.net/uploads/1/3/0/7/130740127/19966a.pdf
    • http://files.mindscapegallerystl.com/uploads/1/3/2/6/132683111/1329c.pdf
    • http://files.oostburgfpc.org/uploads/1/3/1/1/131163957/4c6095.pdf
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdf
    • https://pozugupikuza.files.wordpress.com/2020/06/muvawuja.pdf
    • https://vadidulabop.files.wordpress.com/2020/06/92273915443.pdf
    • https://novodotowivo.files.wordpress.com/2020/06/43710950365.pdf
    • https://kuroluf.files.wordpress.com/2020/06/lekesodipud.pdf
    • https://ratomanedaz.files.wordpress.com/2020/06/tafegujonol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/274

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a38.bin
5380301bda65e08229db5a7b4803c4ce85b9abbed7bb8438e868aa6dd197a50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 5360 bytes
font_01_sfnt_off00007c7a.bin
cde4cdaad3e0415378bab2b16edf87c923b473d3e3be116b229a0ada7b0b9d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7A 10208 bytes

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