Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e29da7e05f18adb…

MALICIOUS

PDF

75.8 KB Created: 2020-07-16 20:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 023403f54328672ce7f6471906bd82dc SHA-1: 0df6713bc61b14ecf9a7e820290e08c7ac5a8cee SHA-256: 1e29da7e05f18adb26ddf2db1a56566474dc3da9c0af3a5e3099d3b35bb9e10b
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically indicates a mass external PDF link farm, and PDF_MALICIOUS_REDIRECTOR_LINK points to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=altered%20mental%20status%20pdf
    • http://files.english.shenfieldlearning.com/uploads/1/3/1/4/131409017/5483724.pdf
    • http://files.calvarywelcomesyou.org/uploads/1/3/1/1/131164558/673f861ecf9c54.pdf
    • http://files.zandertherapeutics.com/uploads/1/3/1/4/131437649/sijunumezarek.pdf
    • http://files.greatestpearlwithin.com/uploads/1/3/1/3/131383318/292646.pdf
    • http://files.embracemyanmar.com/uploads/1/3/2/6/132682110/0fec159e294f8.pdf
    • http://files.harborcitythreads.com/uploads/1/3/0/9/130969160/sobulumof.pdf
    • http://files.bolivarcoc.com/uploads/1/3/1/0/131069764/xipewisugajasiled.pdf
    • https://rigumiroviwe.files.wordpress.com/2020/07/63587562683.pdf
    • https://guwapowir.files.wordpress.com/2020/07/gubizeritovunaxowa.pdf
    • https://risifijog.files.wordpress.com/2020/06/71339834393.pdf
    • https://xelalum.files.wordpress.com/2020/07/74828172655.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/62658613941.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/2639040851.pdf
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/kakepefawosagasare.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/62681745341.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/31141997970.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/85702521347.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_off0000ee42.bin
1da0d9d982ba5f2e959c43c19e478ced953a599c2cf82360f20c0c01e7fb480f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 4900 bytes
font_01_sfnt_off0000fec2.bin
2600f7b9bc076d916d51580f80e250511401620b5ee954d913f3ba23f33741b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC2 10196 bytes