Malicious PDF — malware analysis report

Static analysis result for SHA-256 8611cefd31bd200e…

MALICIOUS

PDF

47.4 KB Created: 2020-07-22 01:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2e02283f2888fa0e1b8d7052cf81b76 SHA-1: 375b012bda1b8a0c2801684f1b7d9ab5887b7ec2 SHA-256: 8611cefd31bd200e61ebef59205c44f7b66d65e88d8b57875d470534b8b5da5c
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a significant portion of which point to a link farm designed to redirect users to malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to 'ttraff.cc', a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Tratamiento de malaria pdf'. The ML classifier also strongly indicates maliciousness.

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=tratamiento%20de%20malaria%20pdf
    • http://files.southcoastsporthorses.com/uploads/1/3/1/0/131071035/lotosovunalag-tolemevo.pdf
    • http://files.eliteedu.org/uploads/1/3/0/8/130813582/df5fee6072.pdf
    • http://files.garnerfritsche.com/uploads/1/3/1/1/131163932/3734f74c470328.pdf
    • http://files.handinhandcrafts.com/uploads/1/3/1/8/131871462/sifopawete-virazugetum-xetaf.pdf
    • http://files.glowmedica.com/uploads/1/3/1/3/131383283/6000948.pdf
    • http://files.handinhandcrafts.com/uploads/1/3/1/8/131
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/bovazipus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/90690588565.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/lasuzomigeganiwowofuvagid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/tulidarapiliwexizuzefavom.pdf
    • https://letajesuki.files.wordpress.com/2020/06/55220678550.pdf
    • https://mokakofes.files.wordpress.com/2020/06/84538333015.pdf
    • https://gipovaxilapu.files.wordpress.com/2020/07/88456528691.pdf
    • https://numuwaxuwilo94341109.files.wordpress.com/2020/07/wevaj.pdf
    • https://mozivafomew.files.wordpress.com/2020/07/fotida.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/6316195755.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gerakofidasetivivirodipel.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5694/files/donalegitelidezanuma.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/penenoxujuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8359/files/gugapopajefuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/gibenerisufusite.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/96772358919.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_off00007c93.bin
64c5be90a9b108418c5a29f2b895aa675bb7f5faf5f3deeccc2379a130510ecc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C93 4744 bytes
font_01_sfnt_off00008c8d.bin
5def115b62e5959cc53b379db035f833c7fb5ca7f011d674622bdbf7fa8fbfa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8D 11120 bytes