Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3d83b92846a8d0…

MALICIOUS

PDF

47.3 KB Created: 2020-10-22 21:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d3edc995320ebf2b7df18dd33b4f03fa SHA-1: 3e09ab26fa42205130f8cd91c598958e1a9fbf7b SHA-256: 1e3d83b92846a8d04887953ef323dd0ee4a52bf6f69a0e7277ee6576e06cec1d
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ggtraff.ru/aws?keyword=skf+bearing+book+pdf+download'. This URL is embedded within the document body, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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=skf+bearing+book+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f89e70b42dec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f905a2b8df7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8717dce800f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f878b528e902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f891f337061f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f872e01e4cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f9130ed3a16d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f8764c41f555.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/d18ffa92-20d5-406c-bf80-803cc0f8dea1/ark_small_dragons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398658e8-bc33-4936-ba28-7116a3e5ddaa/bibop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5e6b65-73ac-483b-9fb8-af3f6a80f18e/42753315004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e8fe5c-d15d-4798-b75a-171d8f4e3267/90587781370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78406d6-c725-4b52-894c-caae5ab244e4/doruvonelujoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8224f73f-a53b-4503-a34d-035c79f7c76a/dowugetidevuziwonineduzex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4eccb4-59e7-4871-9c48-6ad905903910/42707123459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1d64c2-7559-49d4-b9d8-1e2672821126/73197096281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7906198-6759-47ed-bb15-f072d7249964/siduxoriten.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/zafol.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/29564138234.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/bodybuilding_program_for_fat_loss.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_off00005820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5820 12312 bytes
SHA-256: 72b1085e318ce5b68cb0082c41ccb1640dc8760d02200525c39894bed8959bfa
font_01_sfnt_off00007e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E62 5432 bytes
SHA-256: 9823e304b588764cd0a2f9b57ca30bfdf875a2a62030d4ab41515179d86e04d0
font_02_sfnt_off000090f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F8 8976 bytes
SHA-256: 32ad614bf4e4dc06b87ecf55bd08840df799503b5ea9af16495b6f2c0294e482

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