Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7a938ae113cd8b…

MALICIOUS

PDF

68.9 KB Created: 2020-08-16 18:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9230d3b2b1841c4f5f0b9470a6cc0716 SHA-1: 7e292cd789aafa7271c6be28f3ffd62ec257ce45 SHA-256: bf7a938ae113cd8b98087d2eddcd2a686a51254c126a2ba4cda153db421f6712
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to other PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=cetuximab+head+and+neck+cancer+guidelines', is identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, potentially leading to further compromise.

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.cc/pify?keyword=cetuximab+head+and+neck+cancer+guidelines
    • http://nutevi.alexandermakay.com/uploads/1/3/1/4/131453278/a754fab.pdf
    • http://files.artofandrewchesworth.com/uploads/1/3/1/3/131398517/05f40b497198bf6.pdf
    • http://nupisalok.gerdesgala.com/uploads/1/3/1/3/131398473/9640964.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/41505435360.pdf
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/affidavit_of_marriage_sample.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/59228645050.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/71242887700.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/perimetry_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/deravutatojexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/30024516852.pdf
    • https://cdn.shopify.com/s/files/1/0437/9266/2688/files/38974193595.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/fusionner_des_documents_gratuitement.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/16833006225.pdf
    • https://cdn.shopify.com/s/files/1/0435/3042/0384/files/konijo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/chemistry_matter_and_change_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1294/files/vazarilekifidivizum.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_off0000ce49.bin
f955a2d5f82d840ea809c4e43bd109b372b87cc5921b53fe504251223c3ebd88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE49 5528 bytes
font_01_sfnt_off0000e0e7.bin
6aea0dcee667742373cd8313394ebdc3cc3dbfcea09f5dd371e1c149bebee816		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 10944 bytes

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