Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ef5baa283faa6b…

MALICIOUS

PDF

38.2 KB Created: 2020-08-19 04:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d5417a7f52f0ea503a26e721c49aa4 SHA-1: e91c246bea60bab9856a4f5d6375f3bf71fd86db SHA-256: f8ef5baa283faa6b5b8807048c63fc67322f1158151c702a534f78b8d85d59af
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.cc. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com, but one of which is a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to radiography guidelines. The presence of a download button heuristic further supports a malicious workflow.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=fgdp+uk+radiography+guidelines
    • http://xopena.lift4life.com/uploads/1/3/1/6/131637419/badiwetuto_pufizivam_jiverodavisewe_guvinawuvotideg.pdf
    • http://files.jacob-richman.com/uploads/1/3/1/4/131438460/945aa13125bc.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/55689236567.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/81194745586.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/monegudifezunulafofev.pdf
    • https://cdn.shopify.com/s/files/1/0437/1152/9114/files/lewusozijuvilolip.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/50078297661.pdf
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/dojufodenumugadigido.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/espao_morto_anatomico_e_fisiologico.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/22350232758.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_off00005845.bin
aba01250112c2c74808f3bf3ca97fe27567073baec7a391f906725418acc8607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5845 5344 bytes
font_01_sfnt_off00006a7b.bin
ceba08c7e23c31bdd4a604a2c5ee55df7b89acf27722f6ea8ad86a3ee1156e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7B 10060 bytes

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