Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e56e1110d56a23…

MALICIOUS

PDF

69.5 KB Created: 2020-08-31 03:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a531249094533ddf3fb4290a906a40da SHA-1: c830c589053a0d4b8f879ef6a5b26537dd8a3a32 SHA-256: c7e56e1110d56a23fa5ed783112131ed6f44150391a1885d70052e8695d8524c
150 Risk Score

Malware Insights

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

The PDF file contains numerous links, masquerading as a document about 'management organizational behaviour pdf'. One of these links, 'https://ttraff.cc/wix?keyword=management+organizational+behaviour+pdf', is identified as a malicious redirector. The file also contains a large number of other PDF links, suggesting a link farm or SEO poisoning attempt. 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.cc/wix?keyword=management+organizational+behaviour+pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/20083123014.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/sopoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/69583893186.pdf
    • https://cdn.shopify.com/s/files/1/0464/7183/9896/files/wubezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/84068389408.pdf
    • https://static.usrfiles.com/ugd/b8c837_60ea1bff23664044a014429b477a79b6.pdf
    • https://static.usrfiles.com/ugd/3aee12_01d5ea344e6d45f898789cd30de8225f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ca6f42af8504f15a09752679f7346c2.pdf
    • https://static.usrfiles.com/ugd/73c254_b20e1f1e9a5a4a3d920aaaa6d2ab6bdb.pdf
    • https://static.usrfiles.com/ugd/07ef24_124428a810904cfb88a112489becff17.pdf
    • https://static.usrfiles.com/ugd/6c98bc_008fcab626814371b4bdc3c7932486b0.pdf
    • https://static.usrfiles.com/ugd/de3d83_5215b772e1e54e7688c1e46dc8c9ff9d.pdf
    • https://static.usrfiles.com/ugd/769f78_a6728a687b7a4be384c93b52589e4aa4.pdf
    • https://static.usrfiles.com/ugd/b8c837_abd7ae0231f74153a4cf2db03d9db9d9.pdf
    • https://cdn.shopify.com/s/files/1/0449/5376/3999/files/django_templateview_vs_view.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/dezefanavevekofomusiwo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1577/9990/files/88945543865.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_off0000d139.bin
a1a2167669120afd31a76fee51522a337f75a59f13116e43ca9b77480eb406de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD139 5532 bytes
font_01_sfnt_off0000e3ec.bin
be75a77530219c3f00049f3d7f30ed676ee5a98d93d0376705e98ed0179c98ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 10852 bytes

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