Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cd1078fcbb01d8…

MALICIOUS

PDF

47.0 KB Created: 2020-08-09 01:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b408ce1ed38552f316729bfb3d586139 SHA-1: 7b56a84923b427c3750b44766f22a8c6fcb751e2 SHA-256: 37cd1078fcbb01d8d09c97efe552e6954b6db307f020b63e1e5b97980cd8cf09
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text referencing a '30 day keto diet plan pdf free' and the malicious URL. This suggests the PDF is designed to trick users into clicking the malicious link, likely leading to further malware or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=30+day+keto+diet+plan+pdf+free
    • http://files.capedingo.com.au/uploads/1/3/1/6/131637273/fajonexap.pdf
    • http://files.amyryan.net/uploads/1/3/2/3/132302710/6477805.pdf
    • http://files.ndcsw.org/uploads/1/3/0/8/130813528/04f8ddc3f13f997.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/41546765921.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/daloda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/mabaxisodigatisemufifowoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1762/4990/files/86917997822.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/borobinopoxuvuragit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/examples_of_omnivores.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/panomaferagusujapad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/art_commission_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/54333329518.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/bifubik.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/88725344983.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_off000079d0.bin
af5fb5bfb467e90e4b29ccd12f8c709e5d94da663f77c894997974b902041f6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 5232 bytes
font_01_sfnt_off00008bc1.bin
3dd8ec95d7cb2432fa4783946b6223951db7b5b23025d1fc47f115f80502d79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC1 10372 bytes

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