Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79ef8edadb24929…

MALICIOUS

PDF

43.5 KB Created: 2020-10-17 05:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e11794bd11e30a79dcbafa4962081ee8 SHA-1: 5b6eda88a7c1237cd18cdac97d9e76e254eaad88 SHA-256: e79ef8edadb2492907b5de2c9ed7590439a86f59f672618bb651d06e0d02176e
94 Risk Score

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/123?keyword=learn+to+code+swift+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

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/123?keyword=learn+to+code+swift+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8a4a4ad6844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f89a46e7b5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f88cdd5dcbb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f8849411bc67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f89f512c5f62.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/88a303d5-bfaf-4479-b436-01d80f479cc3/56119278217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba769586-a821-4238-bd85-3b850f173117/bakor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a289e58a-90b2-4677-928a-7864486622a0/all_pets_in_terraria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3185ed7c-f928-416c-b19c-0a13ecb390a2/lavinawivatipimabozodene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c8b862-ef66-46c9-aaed-1ed7f35011e8/fuzin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c30b47-11e1-4877-8b76-f33f53d6f8b5/94360455139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f520c3-fe5f-4a34-8fe5-a74733441a01/72821423029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb92524-0cef-41e6-b85b-8156b3de842a/87771947187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff90deee-df40-4070-bacc-777c88b7b095/56859387863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c99627-82ee-4096-b43d-52dbbadaf300/fevanewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b456df0-f651-4801-907c-e10bbdff5d92/25388218737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ebb25f-1e60-44d1-90e0-b38ac22c1a45/sabidodewabusesuxaravuxad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4245f4-d90d-420c-9aa3-dad660d1cf7e/19094437925.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_off00006a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7D 5152 bytes
SHA-256: d76845ef2bd6fae48dda2baf3e3a0fcb786b1e9b6468f74a5d535f626cf4b294
font_01_sfnt_off00007c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C25 10772 bytes
SHA-256: 1aa54c2870744fe6ab28d728c5a5f991c1e0c96705672454731f416624914f2f

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