Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3d0359816a426e…

MALICIOUS

PDF

58.9 KB Created: 2020-08-02 12:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71d2f6cff659f2771ac1525b4ffd6a8a SHA-1: 437ad77284e683563f13bcd4870b6ac5472d6edb SHA-256: 2f3d0359816a426e7aea34dbe6bc511b3585f8613ddd7468e75a455ed9c59023
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 external PDF files. One of the primary links, 'https://ttraff.ru/pify?keyword=munchkin+tabletop+simulator', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or redirection tactic to lead users to malicious content. The heuristic firings confirm the presence of a malicious redirector and a link farm.

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=munchkin+tabletop+simulator
    • http://files.ghqg.org/uploads/1/3/2/6/132680808/vupikozizifego_segudoj_doretolir_sowesakexu.pdf
    • http://files.katsmodernizedhomedecor.com/uploads/1/3/1/6/131606343/172308.pdf
    • http://files.drkamiland.ca/uploads/1/3/1/3/131381112/4919357.pdf
    • http://files.katelandwyatt.com/uploads/1/3/1/3/131383743/0fd901dad1.pdf
    • http://files.kirstennimwey.com/uploads/1/3/2/6/132682655/a0243.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/folland_real_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/tabanezikug.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/47585805384.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/68618790657.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/21008978753.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/law_abiding_citizen_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/72608604185.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdf
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/49776846408.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/33580008227.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_off0000a72f.bin
8c8f05f824e8794e673306957d9fb3cfbe70636e1738c878dcd333ee54efe231		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA72F 5384 bytes
font_01_sfnt_off0000b959.bin
4623489952f72a7ea7ab9c10ce2c01e9c60500055e243e2d1619ea536a638a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB959 11044 bytes

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