Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9159db3c6696dc2…

MALICIOUS

PDF

39.9 KB Created: 2020-08-12 07:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 071614684193391b17ba87eef054b819 SHA-1: ff705b53ebccfe4d66cb3ed75f349fafb1378931 SHA-256: b9159db3c6696dc2a2242056cc6d7ed54bba0e9d0dc335d1ee2afa3b17bb8b12
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at ttraff.ru. This indicates a link farm or redirection strategy to obscure the final malicious destination. The document body, though corrupted, suggests a lure related to 'rational numbers worksheet grade 6 pdf'. The ML classifier 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.ru/pify?keyword=rational+numbers+worksheet+grade+6+pdf
    • http://files.cpprocketry.net/uploads/1/3/1/4/131453574/3286691.pdf
    • http://files.teamemfield.com/uploads/1/3/1/3/131379792/61233.pdf
    • http://files.nphsjrwolfpack.com/uploads/1/3/1/4/131483253/pageponiputi_gosalobire_vopepas_fatibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5947/files/dabitabavakisorovigeta.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5135/files/31986620359.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/nuxuzuvu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/zijimof.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/rizikizolobizotu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/revelation_road_the_beginning_of_the_end.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/judokanen.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1728/files/alice_adventures_in_wonderland_lewis_carroll_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/87375734235.pdf
    • https://cdn.shopify.com/s/files/1/0449/1545/8215/files/boats_and_streams_for_bank_exams.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_off00005c36.bin
4ad4b78ba94fc1a283b6ee85f679ad6bb0e9ba9250a370c415ad92b3241d6b35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C36 5912 bytes
font_01_sfnt_off0000703e.bin
c89636634b23fce2eb868125a5a51349f08209aa1dd0fa340165b6e075cf5b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703E 10192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.