Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e02eb9c28b96de…

MALICIOUS

PDF

25.8 KB Created: 2020-10-11 08:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 69a2b1d3a58b19f08f45be26298a6fb5 SHA-1: 01291b67aec7ff9a51c6d2bcaa1c79514d1aa360 SHA-256: 91e02eb9c28b96def5d279ffdbe0148dda023ae7222e123ac09b4890fdac1b78
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://ggtraff.ru/strik?keyword=ejercicios+de+contabilidad+libro+diario+resueltos In PDF document text
    • http://files.nationalcao.org/uploads/1/3/0/7/130739258/karelasosexi.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/wusagolemaza.pdfIn PDF document text
    • https://site-1039413.mozfiles.com/files/1039413/gojifarov.pdfIn PDF document text
    • https://site-1044240.mozfiles.com/files/1044240/88005365359.pdfIn PDF document text
    • https://site-1036902.mozfiles.com/files/1036902/vexudesenobetimot.pdfIn PDF document text
    • https://site-1040208.mozfiles.com/files/1040208/95715710888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/yang_hong_seok_ikon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0669/7887/files/17011323151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/poulan_pro_42cc_chainsaw_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/vejomiwufakug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5667/6507/files/1100_words_you_need_to_know_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/4552/9255/files/livelook_screen_share_intuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/tohru_honda_cosplay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4202/9215/files/susan_beth_pfeffer_hobbies.pdfIn PDF document text

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