Malicious PDF — malware analysis report

Static analysis result for SHA-256 333297f30eec6f5e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-17 01:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63248fdadbd18d9f51301e7db7a8c0ec SHA-1: 8ef9cf4cd73b5601df37050a4f834aae8c13b5c9 SHA-256: 333297f30eec6f5ee8cce1a93e1e0e97aa3bb0b15de73f4240ac9e8b9b830cc2
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates the primary URL leads to malicious infrastructure. The 'SE_URGENCY_LURE' heuristic suggests a social engineering tactic to encourage clicks.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=clinical+gastroenterology+and+hepatology+guidelines
    • http://files.davidprossow.com/uploads/1/3/1/4/131408528/fbd0f8b5b9f2d37.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/6423571655.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/36828825855.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/6099975492.pdf
    • https://cdn.shopify.com/s/files/1/0436/2128/6050/files/balantidium_coli_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/dojazelazexuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/building_construction_illustrated_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5159/files/57311891318.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/juzikog.pdf
    • https://cdn.shopify.com/s/files/1/0438/7205/9547/files/kinulame.pdf
    • https://cdn.shopify.com/s/files/1/0433/8574/9665/files/vusitolutoxe.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_off000068d7.bin
af891d8a09a76aad2ccfde186d42b3b3731c0b9b472c2345cb265a83d3508137		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 5340 bytes
font_01_sfnt_off00007af2.bin
8a4d2fa03a526d379f6d35b3d602577cfaefadda2805754cb1ad21000416166b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF2 10152 bytes

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