Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa1e7ec338ef4da…

MALICIOUS

PDF

39.1 KB Created: 2020-07-18 04:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8633d75904661ced19004fe69ba84b40 SHA-1: 06b08fbe6a3eba30ac77f4a8de368afea8d126ee SHA-256: 2fa1e7ec338ef4dad0ad933082f7981cc26ab1bb4dd51b53317ff659c210a776
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is part of a link farm strategy. The document body, though heavily obfuscated, appears to contain metadata related to the 'Excalibur food dehydrator user manual' and the wkhtmltopdf tool, suggesting a lure document.

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.com/wb?keyword=excalibur%20food%20dehydrator%20user%20manual
    • http://files.lewissportsacademy.com/uploads/1/3/1/8/131871643/79967b.pdf
    • http://files.coburghighhistorical.org/uploads/1/3/0/8/130814674/6602241.pdf
    • http://files.mvequestrian.org/uploads/1/3/0/7/130775297/muxaxerijelime.pdf
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.pdf
    • http://files.kinematicintegration.com/uploads/1/3/1/4/131438835/287e220ad0e61.pdf
    • http://files.lewissportsacademy.com/uploa
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/25599611465.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.pdf
    • https://cdn.shopify.com/s/files/1/0431/0676/2903/files/3948155562.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/21967174237.pdf
    • https://tujozemope54971013.files.wordpress.com/2020/07/43471237380.pdf
    • https://sutamos.files.wordpress.com/2020/07/74889554651.pdf
    • https://wogitodizap.files.wordpress.com/2020/07/wufokoxipudikumenizexivum.pdf
    • https://sojobumowoz.files.wordpress.com/2020/06/luruvev.pdf
    • https://masobovixapa.files.wordpress.com/2020/06/kelekutasipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/30513036001.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/ximovotofugatinarefanu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/49467893916.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/runapuzozaleb.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/bulevuvagalevarupukeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.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_off00005b6b.bin
e040d02c7a224c9669548084aeea17663f46bab4b9047faff247d55c3a737055
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6B 5408 bytes
font_01_sfnt_off00006da8.bin
9200c706f7118d27a18bb2e6d281f7792b73be0b5e0ad840d44c84b39e356811
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA8 10080 bytes