Malicious PDF — malware analysis report

Static analysis result for SHA-256 913bbd612f5afa6e…

MALICIOUS

PDF

67.3 KB Created: 2020-08-15 12:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49293cd998615193347f2a280d05841a SHA-1: 8536a246717b116c7f8b1a23322f1a1b1f22ab5e SHA-256: 913bbd612f5afa6ef44e2e7ba91f4462987ec8e57964b4f5d0f825b97172c8d1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=nccn+cml+guidelines+2017, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO spam or malicious link farms.

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.com/pify?keyword=nccn+cml+guidelines+2017
    • http://files.mitchellrudman.com/uploads/1/3/1/3/131398091/dixogepulitusif.pdf
    • http://files.veronicadaleyzaleha.com/uploads/1/3/1/3/131398099/kevofo_boguguvoder.pdf
    • http://vipos.mindfit-performance.com/uploads/1/3/0/7/130776326/43f3ec1dcac4.pdf
    • http://wubap.vedranasubotic.com/uploads/1/3/1/3/131383301/ecde70f9.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/88807059234.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/sap_analysis_for_office_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/vinizuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/pakafezosevidifuxiroz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/addition_worksheets_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/59111550930.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/30220942767.pdf
    • https://cdn.shopify.com/s/files/1/0439/1872/1192/files/rupugunagisuzanutogoduwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/98994023209.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/bonfire_of_the_vanities_book.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_off0000c9d5.bin
1d0138d7b35f6ef36bf0b8a2bb4df1a3818146599db88c660d82f59c3abc29f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D5 5328 bytes
font_01_sfnt_off0000dbf2.bin
4688137c81d7cf50b4d0c949193f328be8dad5ae85d5f85e8b048a300b57cfd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 10564 bytes

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