Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbcc291906cbaab9…

MALICIOUS

PDF

35.5 KB Created: 2020-09-02 01:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 775ccfea38097a1d0b33761189b55ac2 SHA-1: 3852a282db8118ddfddfdc5bfb83076cf9c42727 SHA-256: dbcc291906cbaab92873faec2830803a6ee4d661e7d0ea73b98f1775ee528ff7
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text that appears to be a lure for a video, and the embedded link also contains a similar keyword. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a broader campaign to drive traffic. The primary IOC is the malicious redirector URL.

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=con+calma+video+song++1080p
    • https://static.usrfiles.com/ugd/b8c837_96ad637ede0f401fb2f0e59d16a6e310.pdf
    • https://static.usrfiles.com/ugd/221f3a_e11f6754b0054f388ff5eedb516417ac.pdf
    • https://static.usrfiles.com/ugd/3cb679_a3463ee9a5134e4588ef374bcd2e0196.pdf
    • https://static.usrfiles.com/ugd/9b33c5_b9bcee3c99714099b3777c637e2f5d8b.pdf
    • https://static.usrfiles.com/ugd/7ff653_858fe761586946448a88593e016d9604.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/73413481111.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/formulaire_assurance_emploi_maladie.pdf
    • https://static.usrfiles.com/ugd/b8c837_27a0d77b368d467cbf1d346bdddbaac8.pdf
    • https://static.usrfiles.com/ugd/0c268c_572a44ba0f6d464c8e455835dc177327.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7da94b2261e4c6093d4a8ac448c281c.pdf
    • https://static.usrfiles.com/ugd/1e32c2_bd1cdbf50ded4dee9b2f5be334a1a5c7.pdf
    • https://static.usrfiles.com/ugd/0c268c_dcd08e26af5143aeb4e47c724cae1008.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_off00004bd6.bin
fc310ebcb76bebbc000fb280687fe3f2affc518e754bd12103fd749b8d411c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD6 5648 bytes
font_01_sfnt_off00005f06.bin
34d0443ef103a5d36a2b7ae94a723e4fd9419dce5c54706dd040aed8e3fd9fbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F06 10032 bytes

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