Malicious PDF — malware analysis report

Static analysis result for SHA-256 775f66b9d7754d1b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-31 01:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a27316d7ba0194f66a06e3aa18b6238a SHA-1: 296eb1f08119b72116408dee2fe3ebe96eeaa67a SHA-256: 775f66b9d7754d1befb86a41a926e8a12a300a0539c378d5bcd49d9bc7aa39bd
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/wix?keyword=de+vari%25C3%25A1veis+de+problemas+de+palavra', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading users to malicious sites or content.

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=de+vari%25C3%25A1veis+de+problemas+de+palavra
    • https://cdn.shopify.com/s/files/1/0431/6695/7722/files/guidelines_carotid_endarterectomy_asymptomatic_patients.pdf
    • https://cdn.shopify.com/s/files/1/0439/4926/0968/files/oxygenos_oneplus_3t.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7477/files/bilekofef.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/ladubufugadelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/35636486435.pdf
    • https://static.usrfiles.com/ugd/dc51bb_239ebd1690414bf984f0559f51bdb54b.pdf
    • https://cdn.shopify.com/s/files/1/0437/7316/5725/files/gupigetatamufizefimutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/30548915500.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/47724185397.pdf
    • https://cdn.shopify.com/s/files/1/0437/4924/5079/files/dutujiwixumilanamo.pdf
    • https://static.usrfiles.com/ugd/b8c837_104ba1b2b00b40cab1152d3abcee4455.pdf
    • https://static.usrfiles.com/ugd/003b86_f1c07e39fa614b3c9c88d02ae7a2404d.pdf
    • https://static.usrfiles.com/ugd/b8c837_846b09febf96493084f20af08920a2be.pdf
    • https://static.usrfiles.com/ugd/a2e20a_c1ed76dad755440db99db255c2abca3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c93d21e7dd764e2ea686265d444ccb34.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_off000066ac.bin
581a3bcdada954934734e4065aab634a7c55c9428039d155e241d8220499985a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AC 5540 bytes
font_01_sfnt_off000078e4.bin
a389a2375200309e4bb52bba898f5a9ebc625bc488ee13259c862cd4f5c7f271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 12504 bytes

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