Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeaf4303592ca5a1…

MALICIOUS

PDF

60.1 KB Created: 2020-07-29 01:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4fe4d438d0aaf916103a3e50e61045a SHA-1: a285fcb8c4f7b6c22be72a6f5789c381b332889b SHA-256: aeaf4303592ca5a1c9095f2b9e366195a527e8036d995989ad81fc2031fb0aee
128 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, specifically a redirector link and a link farm. The document body, though heavily obfuscated, contains text related to 'Dvt ultrasound nice guidelines' and 'account will be terminated', suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=dvt+ultrasound+nice+guidelines
    • http://files.nhplanetarium.com/uploads/1/3/0/7/130776120/4499418.pdf
    • http://files.onecityhistoricalfoundation.org/uploads/1/3/2/3/132303320/zovavatiguj.pdf
    • http://files.cockburnarchitecture.co.uk/uploads/1/3/1/3/131398260/3e12cdf665d7327.pdf
    • http://files.3realms.ca/uploads/1/3/0/9/130969825/1172000.pdf
    • http://files.militariarg.com/uploads/1/3/0/9/130969472/juzomar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/53792497705.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/bodokizekajugesazorodog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24863128440.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/bosedasutavusexutimul.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/kurexufaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/degilewarusugumekelof.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/nedebekojazopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57515970725.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/53209994869.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/mumaxasitolubekokus.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/safuwovirosabegofurufe.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_off0000afff.bin
9b561f50433bb5e841c244a40ed5705510d6fba2e32515b8e52e02b59e937275
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFF 5048 bytes
font_01_sfnt_off0000c13d.bin
d2fb1cc49fe6b7af0a553405b40179f66d3f19cfb513d9046915316fcbded779
pdf-font-stream PDF embedded font (sfnt) at offset 0xC13D 9908 bytes