Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3212b888d92c58…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 22:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c22eab0e3f28b0c0cc7c0e21564fa3f1 SHA-1: d51efba72ca9f08c1ebd0ddcf5885dea3db6dc99 SHA-256: bd3212b888d92c58897d698e44dabb817d8a34f8027a23be329a42ed78fa5787
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body contains garbled text but includes the malicious redirector URL and several benign-looking PDF links, suggesting a lure to a malicious site.

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.cc/wix?keyword=echo+and+the+bunnymen+killing+moon
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/zirolutojidigoxakoru.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/25435558503.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jojanasesejunuveko.pdf
    • https://cdn.shopify.com/s/files/1/0453/8423/7224/files/geography_quiz_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/60321402134.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/77530490487.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/24393108770.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/95961955190.pdf
    • https://cdn.shopify.com/s/files/1/0439/0882/5256/files/50752112979.pdf
    • https://static.usrfiles.com/ugd/accd1f_054fc8ef88bf4b36889b8c18481e7eeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7f2821b128948499859d5dc8850d0dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f34ff608644465497c549119ec35bbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_175eddbbee2643abaa28acc967ce3714.pdf
    • https://static.usrfiles.com/ugd/b8c837_abcf35407fab42aab17ac4e20d9a7c69.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/71002760322.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/jukiliwapedizaluf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/52934704071.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_off0000699b.bin
b0165f9bcb0af4fcab034b03ed336beaba75fde0e054697354b87a18b84cc19a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 5344 bytes
font_01_sfnt_off00007ba7.bin
cc01374f5f353644ab6839092a37d9c00975442ae89bdc3eff7b5ea13b137896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA7 10160 bytes

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