Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6588e2334b82bcc…

MALICIOUS

PDF

48.8 KB Created: 2020-07-10 05:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbe1e0368dd51face7257be04a932974 SHA-1: c14f109af465f32ab17f342afb2484015ddc8b42 SHA-256: a6588e2334b82bccd0ef8a3ababecd5e64cf62f36774d4d46b5ff4427ec064bf
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to a known malicious infrastructure at 'ttraff.ru'. The document body also contains a call-to-action phrase, suggesting a lure to download content. The presence of numerous SEO-optimized PDF links indicates a link farm designed to attract traffic and potentially distribute malware.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=basic%20electronics%20book%20free%20download%20pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • http://files.alexismariephotoanddesigns.com/uploads/1/3/1/8/131856556/mesojutu.pdf
    • http://files.keepanopenmind.net/uploads/1/3/0/8/130814642/354913.pdf
    • http://files.brookhavenmonument.com/uploads/1/3/0/7/130775972/mutuzugitoja.pdf
    • http://files.hamlinhomes.com/uploads/1/3/1/4/131453241/sonutowowiwiv_jujebepixusijav_datasebone_tawujuzam.pdf
    • http://files.indulge1461.com/uploads/1/3/0/7/130739023/riroriluwunuko.pdf
    • http://files.txokgoldstarmoms.com/uploads/1/3/1/3/131381722/novivugemuxi.pdf
    • http://files.haywardfitnessfanatics.com/uploads/1/3/0/8/130874413/dugen.pdf
    • http://files.aimdistributing.net/uploads/1/3/1/8/131856556/wikixebevowezija.pdf
    • http://files.ctram.net/uploads/1/3/1/4/131407292/243403.pdf
    • https://rirewiza.files.wordpress.com/2020/07/kiwuwuxejomod.pdf
    • https://lajosesofi.files.wordpress.com/2020/06/57418658815.pdf
    • https://waxopamu.files.wordpress.com/2020/06/ribuboxulirenuwutirufisif.pdf
    • https://jukawuf.files.wordpress.com/2020/06/67834615084.pdf
    • https://rufumeridap.files.wordpress.com/2020/06/14375439410.pdf
    • https://vedededegi.files.wordpress.com/2020/07/89809754928.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munuzajutajamarigeregutoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kividerinogofigizunewif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b71.bin
51bd8b70e1de2ad5161b7885e410a96a5d3c3797d13cbf26fcd70ddc701eaed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B71 5280 bytes
font_01_sfnt_off00007d6b.bin
89454d8ece1be00d2333aac76955f46ed17c4d141322e635bf27f42efb43e54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6B 2116 bytes
font_02_sfnt_off00008737.bin
2a04ef929fb988343523a74b16094ea7550c86baf3a8545b5b3d45b9f2ab26e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8737 14800 bytes

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