Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd4601b26a3db42…

MALICIOUS

PDF

68.8 KB Created: 2020-11-04 03:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 591ae956ab9e61af048b0f658c37eb35 SHA-1: 3d0b39a97efd80f803bf37198390994cd5c53f50 SHA-256: bbd4601b26a3db420e4a431b18e9b8b78d12b5b956bcad125bc2c4b03a096530
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/aws?keyword=long+form+attachment+styles+questionnaire+pdf, is the primary indicator of malicious intent. While no scripts were extracted, the presence of a malicious redirector URL strongly suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://cctraff.ru/aws?keyword=long+form+attachment+styles+questionnaire+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8ef7e042d3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/iowa_department_of_corrections_waterloo_iowa.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/gepivafizaxak.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/52739755460.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/aspen_follett_north_kingstown_ri.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/walapaviwubixiduvum.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/dulunoned.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614cacf7-4029-4dcb-b73b-d0644aa793f8/331873253.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/waxaxokejezubazewedani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8beb382c-528f-41d8-84a9-9a7896b312c4/paypal_error_code_10001.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/baixar_para_celular_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b51c616-362a-4675-b04f-448fbb06946c/27288570242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d4cc72-32d3-4d30-ac8a-498063192d94/12316597447.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA47 3064 bytes
SHA-256: 853f993b97a6ef13d4f33c44dfeffc31ef2e0f71392b5230c63e5a4a03543fb2
font_01_sfnt_off0000c512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC512 5736 bytes
SHA-256: 5494cbe1fd43ddd1fce63d3d3efb4f570e7eb10360b729de79fea87a39071954
font_02_sfnt_off0000d872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD872 1752 bytes
SHA-256: 05b2dce1fa6ac8264ac81529f8069d8f9b875d86c4fdc6e04f7832785061497a
font_03_sfnt_off0000e11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11A 10748 bytes
SHA-256: c2b8157b7562b610e44409620bf3955e567dd645e42e486d7220b0d1aac21011

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