Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0565f767e549ab…

MALICIOUS

PDF

32.2 KB Created: 2020-11-05 05:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7def5e27af1c3a8b93fa669bdf597fad SHA-1: 167793605efe5acebc78e5e9c4983caf916a0f0c SHA-256: 2e0565f767e549abb3c108a092bcc07a56a76dd96213e7b02f93f0576da44d96
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/123?keyword=webwork+calculus+2+answers'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick the user into visiting a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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://ttraff.ru/123?keyword=webwork+calculus+2+answers In PDF document text
    • https://jelamiwigu.weebly.com/uploads/1/3/1/3/131382248/9773398.pdfIn PDF document text
    • https://nutarubanamu.weebly.com/uploads/1/3/4/5/134528768/medajani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f87141d950ff.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/454958aa-560e-49cc-89be-2449440c5bd2/27902504100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba660a6-086e-4ca4-886d-27b33c420150/77539659291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4695117-e77f-4611-ab32-db0acb2c08c8/likezakikaduva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7829a3fb-8616-406f-9c4d-932367c66072/nemudefowidojive.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/67612235979.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/great_is_thy_faithfulness_descant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0095c14e-4c93-4e80-b434-12984a5a61b6/mirujuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4fd7a3-2ac7-4f0a-b6e6-99e5cb57affe/dawuwikivuvavugipefan.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_off00004268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4268 5232 bytes
SHA-256: d310922bccb1c09056aeb98909e3cfa808590c33fb690c0e6a393d00b136e39b
font_01_sfnt_off0000545f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x545F 9472 bytes
SHA-256: 80c9f670028f6b30eca869e4839054084af60e27d614f47ffd345f891e3a2ba4