Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e820c7a8d70bf27…

MALICIOUS

PDF

44.1 KB Created: 2020-09-16 01:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00591021c3ba8a04a29a9031c14677a0 SHA-1: e0c002da14618506777b926e752306c1ead4945d SHA-256: 8e820c7a8d70bf2795bbde0526e57dacc9795d83b9e058830474841a1fe45811
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary link, presented as a 'Canterbury tales character chart blank', leads to 'https://ttraff.ru/wb?keyword=canterbury%20tales%20character%20chart%20blank', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to a malicious site.

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=canterbury%20tales%20character%20chart%20blank
    • http://kuwarin.tiffanypromise.com/uploads/1/3/1/8/131856271/2a8754.pdf
    • http://rivaner.crosswindministries.org/uploads/1/3/1/4/131483138/bugometosajek_logexodonev_buxivezedadus_ratevemakadevif.pdf
    • http://rixesit.donjasdogs.com/uploads/1/3/1/8/131856222/4289420.pdf
    • https://static.usrfiles.com/ugd/717a42_e8613b9edda545968bad4873b7153eea.pdf
    • https://static.usrfiles.com/ugd/15ebe2_6dc8dee809c94e3c81228f733e89107a.pdf
    • https://static.usrfiles.com/ugd/87b9a8_fb063423501340be8dd44f16b7d3751f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fd86df1d45b439bb0196b904063b124.pdf
    • https://static.usrfiles.com/ugd/35f767_5c1b431b60ac4435997cff5597e25f54.pdf
    • https://static.usrfiles.com/ugd/9bd8c3_f58faa9c533a4df488c90d5c664d254d.pdf
    • https://static.usrfiles.com/ugd/417718_9ea20bc1d687486c92a8c66c85722bd9.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/prairie_bonnet_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/bilanzanalyse_baetge.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/55797820192.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_off000070a0.bin
0cad1c3a3b4a4c655f1f44d97cf15493a800233e2a19013cc5050617715dc91d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A0 5100 bytes
font_01_sfnt_off000081ef.bin
9a82b2ee51a1cd22a83236ef55fd01227ca6ff518a2723381e892bb4515e238e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81EF 9784 bytes

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