Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c594e5b85ffa36…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 15:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aa0e36db571d67fb5834ec0c3e3bcb0 SHA-1: 6276117d01e6b40b7d67920b5cf672d9f4378604 SHA-256: 33c594e5b85ffa36378fdf773594b7c1640e3e05b38658876bec8ea79d842d5f
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=social+entrepreneurship+and+innovation+pdf'. This indicates a phishing or redirection attempt. The document body, though heavily obfuscated, contains this URL and other links, suggesting the primary goal is to drive traffic to malicious infrastructure. The presence of multiple Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic to improve search engine ranking for malicious content.

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/pify?keyword=social+entrepreneurship+and+innovation+pdf
    • http://files.northhamptonvfd.org/uploads/1/3/0/7/130739169/vasubori.pdf
    • http://files.hudsonfarmersmarketny.com/uploads/1/3/1/3/131380875/8e2c07c776e415.pdf
    • http://vasalito.geostudios.ca/uploads/1/3/0/7/130775085/todugoniworaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/42241997682.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/tuzir.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/41709909656.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68769425665.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/best_reader_and_editor_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/nogediguwexutopow.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/2265813435.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/4672051720.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/yamaha_maxim_750.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/nuzadodinukelefemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/boyer_moore_algorithm_java.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/67353143743.pdf
    • https://cdn.shopify.com/s/files/1/0438/8130/0123/files/51909844255.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_off00006353.bin
21157f7e94cbea458289b2b20d113de3028bb91394d22f81c706c05d452946b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6353 5408 bytes
font_01_sfnt_off000075b8.bin
c3af6297959abd64c19f6627ff0d515b4357d7afda123bf2d89cdb099d7f1e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B8 10980 bytes

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