Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2096396a2e7965…

MALICIOUS

PDF

45.9 KB Created: 2020-10-30 15:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3e96b09af8e27ff5b79b534696113dd7 SHA-1: 1870102e78dbfe6d5228ec5deac0dc038e0f5c7b SHA-256: ed2096396a2e79657f99da4bcecd29def94ac4e605d27a0c4ac896443de7cb03
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document that contains a lure instructing the user to enable editing, a common technique to bypass security measures. It also contains numerous embedded URLs, one of which, https://ggtraff.ru/aws?keyword=formato+5.1+sunat+en+excel, is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/aws?keyword=formato+5.1+sunat+en+excel In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5f8af2296e07c.pdfIn PDF document text
    • https://gorogibaxatup.weebly.com/uploads/1/3/4/3/134329925/segajogima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f99ea50e1a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f8b7207c0db5.pdfIn PDF document text
    • https://puxolulif.weebly.com/uploads/1/3/4/3/134356270/1727584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f9505f5a7e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86f96fdddad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409607/normal_5f97b9dc4f1d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_5f93784f97044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5f99410ac29e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f8c255590e22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f9677da9f040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5f976cc4b696c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f8edc77008f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f907cb3325e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8740/2405/files/ruet_admission_circular_2020-20.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000710b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710B 5176 bytes
SHA-256: 3f9dc3dc5fd7701119bf14a4458c2469b31c82f2f88f92c7ca7c73f9d881531e
font_01_sfnt_off000082a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A1 12332 bytes
SHA-256: e472f3a09efca5222599d266d07545a4b2b49429cc0b3953d5fbbbb5b0e548aa

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