Malicious PDF — malware analysis report

Static analysis result for SHA-256 548b8f92672ed8c0…

MALICIOUS

PDF

41.0 KB Created: 2020-08-04 02:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a5f8105b0685e47f39f639bb2c2118c SHA-1: 0ca43c0d536e97673f0da5d8588cd57cae1e9a91 SHA-256: 548b8f92672ed8c05f11aef462b3b88ce131a192ca4332e3a790ef498d4e28d3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. This indicates a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious URL is https://ttraff.ru/pify?keyword=marvel+comics+encyclopedia+pdf+download, which is likely used to redirect users to a further malicious destination. No scripts were extracted from this sample.

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=marvel+comics+encyclopedia+pdf+download
    • http://files.eastkingstonlibrary.org/uploads/1/3/1/4/131438330/5649b3afe627eb5.pdf
    • http://files.sheerinspirationpolefitness.com/uploads/1/3/1/4/131453725/658806.pdf
    • http://files.inthepinklaughteryoga.com/uploads/1/3/1/4/131453034/8088397.pdf
    • http://files.desuave.com/uploads/1/3/1/8/131860787/1996716.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/13843753288.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/learn_advanced_excel_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/23313231449.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/27335695622.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/16331572093.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/venaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1385/5643/files/80347073991.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/macys_day_parade_lyric.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/47590734893.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/95327055748.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/convert_xlsx_to_xls.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/annotate_files.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_off00005d8d.bin
e58e78e65a6453afd47bfec2435613d0fb341c7c684a66d014de5c312c35c050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8D 5560 bytes
font_01_sfnt_off0000708d.bin
a50843ce3a103b462ecdaf15fc80085073427577e0394d9badebe0e954456756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 11268 bytes

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