Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace97e9928d77ba5…

MALICIOUS

PDF

44.3 KB Created: 2020-10-05 04:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7e8b47590ebb09a4abaf64d2049997bc SHA-1: 7bd39397586beb8b10ee80c56c9ae13f53d12743 SHA-256: ace97e9928d77ba5e840c3154cdeeed78b2d891878a65fcef6471a46268d03a9
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically `https://ggtraff.ru/strik?keyword=bobcat+s630+maintenance+manual`. This indicates an attempt to lure users to a malicious site under the guise of providing a maintenance manual. The ML classifier also strongly flagged this PDF as malicious.

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=bobcat+s630+maintenance+manual In PDF document text
    • http://files.mustardseedsgrow.com/uploads/1/3/2/3/132303312/tutimabe.pdfIn PDF document text
    • http://files.bestchiropractortampa.com/uploads/1/3/1/4/131482859/e79de67a.pdfIn PDF document text
    • http://files.mehlmansmunchkins.com/uploads/1/3/0/7/130740517/nisiwosesuk.pdfIn PDF document text
    • http://files.theelectricchairman.com/uploads/1/3/1/4/131407695/vanenepipas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e9c5ba40-2bb2-4cf0-8711-2434bbbcc619/37851535642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6de645-6928-4e26-9e96-419efb00a2ce/51125163913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61caba4-46d5-432f-9476-66a70e1640aa/16516418435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59635663-7c9e-464c-b3d0-78413d3b63b8/98833027393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff433d0-b97c-43cd-bd1e-59c60d3f42f4/31131470253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93b436b9-30e8-48fe-9c22-9a2cd35fd674/gajaruxunemele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290b77c3-a6a6-4c9e-993f-a2ea502cb4d0/lavuwodaresuwefegofewubet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9c5c1f6-59bd-40e8-be01-66767a8bc961/gatulativolof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5808a24-4e41-4a77-a2ba-200692c5896f/88686632417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640c0e15-4f2d-4347-8745-9cf983e0e5bd/46485072693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef10e947-8e02-4c85-986b-9e628b35790a/42904951385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6d790e-56e9-4bac-984f-a79b289ffcd1/bugivoselutajamevox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c00ef1-4a6f-4c15-a45c-f01a86c7fcaa/tagojunulamuxepekujinar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259f759b-9fee-41ad-9d8d-fe892a21dcdc/sokotojagurinef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3153f96a-3017-49cd-a8e4-01a158a2ad06/52934506927.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6191 5380 bytes
SHA-256: cfd9ccb5523c1199c99c5f7df956e0454289e036bb0fd138d60d33d501f6b0b1
font_01_sfnt_off000073b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B7 9996 bytes
SHA-256: ce6df820517a3668cf475f7336eaaca4c4a14de98fd83d8e57d62eddef85cd99
font_02_sfnt_off000095e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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