Malicious PDF — malware analysis report

Static analysis result for SHA-256 2438fee63af357a7…

MALICIOUS

PDF

100.9 KB Created: 2020-07-29 00:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56e54c8f13c5de9aeaa6412bb72dae20 SHA-1: f60bb81699b7420fa4decc8b0f890bd415d4b173 SHA-256: 2438fee63af357a75af43b091ef51f4ddd6b6d1d0b23b1d5a8ed610df6d3e47e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=thoracic+aortic+aneurysm+screening+guidelines', which is likely used to redirect users to a phishing or malware site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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=thoracic+aortic+aneurysm+screening+guidelines
    • http://files.nrgphotography.com/uploads/1/3/0/7/130776272/5038336.pdf
    • http://files.nbctechnologies.com/uploads/1/3/2/6/132683357/sepanar-lupujo-mivorobeku.pdf
    • http://files.nationalmustangday.com/uploads/1/3/0/7/130739147/satofurog.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/suzafazobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/fajoduvekevu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4202/9224/files/wofasogavanesene.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/soxikekinetiwarulokupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/78515560782.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/patawumogajizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0774/5958/files/66480705394.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/86048038555.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/53334694550.pdf
    • https://cdn.shopify.com/s/files/1/0436/1145/5645/files/nipinegek.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8116/files/dubaxigafo.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_off000142ce.bin
3e7bc935979ea4aef1c00f6bfc575dc6fbbd480b59a78e2dc0b839d493c71c32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142CE 5284 bytes
font_01_sfnt_off00015499.bin
5f0c156dbdced99396b5287630b2444a9250356a7153cf9f4a7de8b64334df7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15499 15676 bytes

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