Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb4be22d39a2d34…

MALICIOUS

PDF

43.8 KB Created: 2020-08-12 08:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4df2e0957e26d158ea64b2dce885e62d SHA-1: 87bd30975069f20fd24e2e7ffcbfd45952581c68 SHA-256: 1eb4be22d39a2d34bcbad31aebc5c030559397abe9db29dcaf5302fa41ec1c1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body text, though heavily obfuscated, suggests a social engineering lure to install a browser extension or update. This is supported by the 'SE_BROWSER_INSTALL_LURE' heuristic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or malware download.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/pify?keyword=biomechanical+principles+of+tennis+technique+pdf
    • http://luzuk.ancientsonespeak.com/uploads/1/3/1/0/131070447/murisevi-xavaf-rajokodeput-bamesin.pdf
    • http://files.fredkaplanbiographer.com/uploads/1/3/1/3/131380107/8174254.pdf
    • http://files.lombardyreview.com/uploads/1/3/1/3/131380337/6975451.pdf
    • http://files.thejoyoftango.com/uploads/1/3/2/6/132682063/4968442.pdf
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/61730782529.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/kixalejamutefade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0635/2804/files/36558006497.pdf
    • https://cdn.shopify.com/s/files/1/0436/9121/2950/files/41957303840.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gozoba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/nebemoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/tefumu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/37817362953.pdf
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/boxemoduzerovanifipefuxig.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/xokazal.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/ferunugenufax.pdf
    • https://cdn.shopify.com/s/files/1/0436/5638/0574/files/garvin_nuvi_760.pdf
    • https://cdn.shopify.com/s/files/1/0440/5339/7654/files/sedukuv.pdf
    • https://cdn.shopify.com/s/files/1/0439/7550/8126/files/94665962980.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_off00006d71.bin
227e7c10e730812c5bdf4a04c60c4f827c419e4672656bb3cccc826df3b8e43d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D71 5568 bytes
font_01_sfnt_off0000802d.bin
ecfd904d75cea2ae6e59a0f35438182e656907274f509e0d43da10a5b938294b
pdf-font-stream PDF embedded font (sfnt) at offset 0x802D 9980 bytes