Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af99921be762d2d…

MALICIOUS

PDF

44.3 KB Created: 2020-07-31 17:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2e261ce4b4afd37eed002ecb1e17676 SHA-1: 2abbb0d7aab8dc843df758d09d759b2cd5ab911f SHA-256: 9af99921be762d2d26560847047f3cdbc8c96d8e8d5c3adad9cf021ffcb3b24e
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely for SEO poisoning or to lure users to malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=www2.+honolulu.+gov%252F+nbe.

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=www2.+honolulu.+gov%252F+nbe
    • http://files.cscdlab.com/uploads/1/3/0/8/130814110/munewep.pdf
    • http://files.nfca.ca/uploads/1/3/1/3/131382134/2022340.pdf
    • http://files.unconditionallovefoundation.org/uploads/1/3/1/3/131379820/4704392.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/74940819031.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84602765162.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/21925983047.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/1019767848.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/54305343655.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/tozodirifulaxop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/bivikikupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/21160497083.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/84954598121.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/18462710168.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/
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/184627101

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000688e.bin
ccb8dd442869da590f1b4357d84d8c150e172b77556ba7beaf89f5747257500c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688E 4968 bytes
font_01_sfnt_off000079b0.bin
e7b351397d55b7339c112b713b9c8ae2f45cecdc4f2ae662cae7f107780b0301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B0 13444 bytes

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