Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bb4407446cc4fb…

MALICIOUS

PDF

50.6 KB Created: 2020-10-27 09:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f01c0268d81a546f578bb52bd7e3d902 SHA-1: 987d07d4ff32f406bc0a346d7fbffcbcbbc70bf9 SHA-256: e7bb4407446cc4fb9ccb68847a77412ed6c390852015d594d1e5e9948786ae25
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary malicious link pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to direct users to potentially harmful content.

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://ggtraff.ru/strik?keyword=pathfinder+srd+classes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f8f31e1566ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f896aecbef9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f9415a469d3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87f6639e5f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_5f9715d83b0a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404512/normal_5f96b9e65dfa3.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/dd6524c49.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/gasifanaziram-bebuj-seniwixujibofu-gowiwusegunoz.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/rafaxezonibe.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/1782681.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a294ae-5e99-4f91-b9ed-c65cc438e4ba/44955282067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0f5d09-0424-46c6-88e6-0d4c192153af/mijiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae396a8-c00c-4e4f-9527-bad381d90a00/42477032352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aaa012b-5ae8-4258-9f06-00733411d2ee/wivinaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c41c67e5-50f0-4eb3-8c28-2aa4acb288c2/jexiwajavepemefezafisa.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/buwuvit.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/endometritis_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jagogiwunot.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/39540072799.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/49783824306.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/gigixitajajawelodomopoxep.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/building_codes_illustrated.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/fifusutag.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/nitifemoxuw.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_off00008868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8868 5112 bytes
SHA-256: 0de1c3ad9fd2fe8b22165c91552e701328a261be67215416d13bc50ded78a228
font_01_sfnt_off000099b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B7 10340 bytes
SHA-256: e1ddcf7588dd5045d6b34f5add98214647f9eb5fb2f6d8dd7e55870993ae801f

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