Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a2637f36204a05…

MALICIOUS

PDF

37.1 KB Created: 2020-08-14 15:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ea891afd1c99e6e18d4f84d18f30640 SHA-1: 0c6f4b04caa0f86fd0e579f4ba64593d46f45bdd SHA-256: f4a2637f36204a057fad8d529ad6b897fce002b3999c6d9a617827f570181c3e
120 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.com. The document body, though heavily obfuscated, contains the same URL and a reference to 'cpr guidelines 2018 uk', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, likely to obscure the malicious redirector.

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=cpr+guidelines+2018+uk
    • http://files.synergymhs.com/uploads/1/3/0/9/130969185/1305e6c4db5efb9.pdf
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/brew_install_mysql.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/administracion_publica_descentralizada.pdf
    • https://cdn.shopify.com/s/files/1/0444/2020/2663/files/logewodi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/xujurefadabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9868/files/power_of_speaking_in_tongues.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/bajegalok.pdf
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/54320294980.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/data_structures_and_algorithms_made_easy_5th.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_off000053d7.bin
41f04531b734b3de9b22f169bc76c1952576cb878647371d69c2e2bc25e49567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D7 5408 bytes
font_01_sfnt_off00006654.bin
b5829559ddd69f996ba7d48b0381ecd7a91ad6a060364f49efc825567d133731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 9916 bytes

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