Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a8d4380d9289c9…

MALICIOUS

PDF

46.7 KB Created: 2020-11-03 12:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b868a3f3e581633e5cdf3663ec883d8f SHA-1: 9399d036576e30850260131bfb632dd35c70a323 SHA-256: a1a8d4380d9289c992bd171e76993a3e1c078a0c76fa4174d448e94bf50af3a6
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/aws?keyword=lev+vygotsky+social+constructivism In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fa04566430a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5f9207b1b9232.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/d78c04a1-e236-46e5-8a3a-97be4760e724/vazobere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b60ab48-f4e6-49dd-9db3-c038c124087c/90743079344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee694678-50ad-4a1a-a11d-765533b8facd/vuvufiwivumonoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bac64e4-a299-4270-9347-19f0becdc817/gegekesuferixaladamamawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd74294-62da-4ef9-852b-ea9dd60b14af/digagitutifenopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef56951-6eb5-476f-83de-e4082b3a1f1a/long_john_silvers_nutrition_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339a3baa-8d12-470c-9e4f-a2921fd4b832/5132097204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ce6be4-c1d0-4ba4-89d5-05f1efa1ad73/4060087732.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_off00006b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9C 5168 bytes
SHA-256: 51f9e02d6d6bc9f27a990673184f962e8c5f61f89b1861b6643c7650e393fd63
font_01_sfnt_off00007d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2E 10120 bytes
SHA-256: a1487d41b51482de38ca4e07d55314726db076d4c396c2604c87b45f71926abe
font_02_sfnt_off00009fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c