Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f7bffe57cbfcab…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 18:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74445e3e2061e59336c57ff15d0a256b SHA-1: 18277b330df172bc792de84db3e8ca6af57bc843 SHA-256: d9f7bffe57cbfcabbe53f72a07412fb99bb26e2cd0aa84341ad646a7ab428679
120 Risk Score

Malware Insights

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

The PDF contains a lure related to an 'emotional support dog letter to landlord template'. It embeds multiple links, with one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=emotional+support+dog+letter+to+landlord+template'. The PDF also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm for SEO poisoning or to obscure the malicious redirector. No scripts were extracted, but the primary malicious activity appears to be redirecting users to a harmful site.

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.com/pify?keyword=emotional+support+dog+letter+to+landlord+template
    • http://files.universalengravers.ca/uploads/1/3/1/6/131636855/07c679e0c3c82e.pdf
    • http://kerum.minxiejewelry.com/uploads/1/3/1/3/131384362/bozuwidituki.pdf
    • https://cdn.shopify.com/s/files/1/0440/8259/3957/files/53463404357.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/podoligob.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/real_world_inequality_word_problems_worksheet.pdf
    • http://mebamama.mildredspantry.square.site/uploads/1/3/1/8/131856827/1b936a9fd.pdf
    • https://cdn.shopify.com/s/files/1/0433/6700/6364/files/vedujumebutimule.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0229/files/size_of_dictionary_python.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/31587178383.pdf
    • https://cdn.shopify.com/s/files/1/0440/9910/9016/files/67863670721.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/mapirokejevupeki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/minecraft_tinker_construct.pdf
    • https://cdn.shopify.com/s/files/1/0459/2317/2503/files/walofasogodugebus.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/76946179357.pdf
    • https://cdn.shopify.com/s/files/1/0435/6512/1695/files/marathi_calendar_june_2020.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_off000066e9.bin
d436222cba7f4f5b0deae27af0a23bcb47eb6e26e7cba523e9594b2c6f35ab95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E9 5236 bytes
font_01_sfnt_off00007896.bin
6193c853016e620481ca9db29d6de1d6a5e9bd8b72bb185a076abe0b1e78e9cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7896 10384 bytes

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