Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0a228edef72eee…

MALICIOUS

PDF

41.2 KB Created: 2020-10-27 19:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f575bfb529275e882b602c66e719f5f8 SHA-1: b7ac8f68e8d674dc40ac17388020eaa57685eb89 SHA-256: 1c0a228edef72eee498448319b5711672e050c54add3c30d6789ac64635495ba
94 Risk Score

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 critical heuristic indicating a redirector link to known malicious infrastructure. The embedded URL, https://ttraff.cc/123?keyword=su+song+that+trong+thien+chua+quyen+3, is likely intended to lure the user to a compromised or malicious site. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of malicious intent.

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.cc/123?keyword=su+song+that+trong+thien+chua+quyen+3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f9123a46acf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8816ecc5289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404122/normal_5f9823dc6757d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f885d0800e32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f89a27386b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f96e0f0c8cfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5f976eba899bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5f8b3e0e1f41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5f8d14c525997.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/zobuwubedak/employee_letter_of_recommendation.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/devuwarolebimelug.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/lukaripi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/semogididu.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/gozumitakubipaga.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/87680288255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e3b14a-3793-4b5a-8deb-81eb278b052e/punoratupulunosopirez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da296d3-c1da-4dd0-8965-2b3be5a9e7e6/58775510605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b91efb-ccb1-4422-a5bc-e526ec6a6d8d/ripexazosezexipesizosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f04ea33-1b81-46c6-bb61-6a43081dcd2c/tuzamelewemirinitib.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_off00006063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6063 5524 bytes
SHA-256: 304e07a8e8ddcde105b883ead9da74f4212232159bebac505addf82aa0741894
font_01_sfnt_off00007321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 11360 bytes
SHA-256: 996f2f5a5f75ec309fa2e372c566b06fc400ed141970d5f2bd5bf0663a66c9c5