Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd289f2265cab588…

MALICIOUS

PDF

50.4 KB Created: 2020-10-30 23:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d2acde9ba378609355d529d595f4c3cd SHA-1: 7afff7e2a45e5f75b901c90e7c9e75309ff98181 SHA-256: cd289f2265cab5881044861ba2feb845f3218965b23533da8035f984a8bc3b6c
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a link to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/123?keyword=single+speed+chain+tensioner+nz, is the primary indicator of malicious intent, likely leading to a phishing or malware download site. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing or redirection attack.

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/123?keyword=single+speed+chain+tensioner+nz In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_5f9a0d199df79.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/73d69b72-2682-46fe-ba56-83867fc1b90b/pikabex.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/80759083747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d731c3-cccb-4261-af47-db43bd2669b5/26592050503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6e5508-8d7f-420a-8f00-eb2d6ff42b58/martial_arts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0c46a9-379b-487b-b8b5-47e9f9300249/vebofanenewug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a702d3-4f9b-4272-8b18-2f198e7a8572/92314162117.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/larousse_livre_de_bord_orthographe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da219226-ff5b-4047-bceb-4fa822de0c2f/71023030947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17de571-41bf-44ed-b0e5-01499305516d/rujexatiwutowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b84df64-5f39-48dc-b9c1-ab2e2cefcfba/83573367258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720bc0c9-fe52-4d86-8c17-c4f86708596b/terigotozekimal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a93838-b8b6-459f-8a66-65da0fac7fdd/sex_linked_traits_worksheet_answer_key.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFE 5488 bytes
SHA-256: a8b5afc0daf88b861b68c588ac6be27ff5513592c96fe0191f46ebb41d8bc970
font_01_sfnt_off000080ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AC 11084 bytes
SHA-256: 96a2607f57b5b9a0d2b85aab745604bff6fa81ccec29c4334f03c22c72b9dc2e
font_02_sfnt_off0000a6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B1 16556 bytes
SHA-256: 280d42e05f7976976b408d76328ea464eeab0a602f4823f2f245f510b795dc6c

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