Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab7cc7c088a2124…

MALICIOUS

PDF

60.2 KB Created: 2020-10-27 01:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dd41f6795aec120123bd321991022077 SHA-1: d5fb198cd3798448ac74aaa4fe439a9faf14db35 SHA-256: 7ab7cc7c088a2124ec560bc29e55c7f3026f2a8e4ba891e5ff6665e09b1bd27e
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to its inclusion of a link to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The embedded URL points to a redirector that likely serves as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://gettraff.ru/strik?keyword=the+buy-side+marketplace+is+similar+to+the+business-to-consumer+model In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f90cd7456e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f8d129090e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f8e7fd64c126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f8e5c1e52a34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f89f7afa5455.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/1/0483/7897/0272/files/autocad_dwg_to_converter_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/v._s._pramar_design_fundamentals_in_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/baroduvekugumuluj.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/building_construction_wb_mckay.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/carry_on_my_wayward_son_tabs.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/volesutatasidoboladetu.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/32160655686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269fbef4-ea78-4d55-88ed-ec0b80360349/pivomabep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3f3aa9-46b4-4fb6-8dcf-ff15afc0d3f6/1665369626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d8cfd7-fd7b-4d1f-93f5-f249e981b889/35803763455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59746d3c-d33a-4100-953b-052bc252ead3/61868965999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ade8d0f-5bcd-4956-95e8-256220ad4238/nulutaleve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36cb81a-d188-4616-aeb1-6eeb89f129a3/78768169904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ef3c24-386f-4560-bf49-07e5d673fbdf/78296173151.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_off0000a945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA945 5600 bytes
SHA-256: 8e6bfa63ec20242f90d355f64ac1f45f3db31110870bb69ea817531a6e932131
font_01_sfnt_off0000bc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2B 10768 bytes
SHA-256: 6784d26b8923c4f2c7d574cbd86a0b7295dc1cde536141b838422f3eb60e30a3

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