Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0ed9215b78bb1f…

MALICIOUS

PDF

35.1 KB Created: 2020-09-01 15:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 978d9c6f95bf569058d115ca0d6481d5 SHA-1: 6d4ae885c53a19a5b3d1faa953cb9cac7e07a532 SHA-256: ee0ed9215b78bb1f210b3dadff7fd0b834d87c39b876cdcc97847b970f58c8c1
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=ada+diabetes+guidelines+2019', is likely intended to lead the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, suggesting an attempt to disguise malicious activity within a large number of seemingly benign links. The ML classifier strongly indicates maliciousness.

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.link/wix?keyword=ada+diabetes+guidelines+2019
    • https://static.usrfiles.com/ugd/7e6083_7f900a54b131435c98aa16dd8b0f79f0.pdf
    • https://static.usrfiles.com/ugd/d5415a_491309650af44ea2a77a179c918a1e8b.pdf
    • https://static.usrfiles.com/ugd/98e298_fe40273d8edb42dd902ca9267cfa71ff.pdf
    • https://cdn.shopify.com/s/files/1/0437/7447/6440/files/algebra_formulas_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4399/files/shiva_motu_patlu_cartoon.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/bapubazixiwasovunokipiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/getimesuvatujunolapagif.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/valoropowife.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/xetovodirojagatuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/domazimixududapubureji.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8886/files/sotapobigurojiripasuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/gmat_awa_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/sogajefamibuxa.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_off00004b7c.bin
1848c4b03f84880503a0535934578a4436a74d984e4b05025ca6f761827fce2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7C 5508 bytes
font_01_sfnt_off00005e3f.bin
d8d2831a9e0d9bde7751fc3c6f4c1afe50894c5586d376e3998985b804a9cb1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 9896 bytes

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