Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0037ecbd58f941…

MALICIOUS

PDF

48.6 KB Created: 2020-11-04 09:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 71adaa9f1def6ecc514a2758e8fe70e2 SHA-1: 26776c576ffe469d46cbb4c86cbe9eac261e92c8 SHA-256: 2b0037ecbd58f941652bf0723f5ba68d462895dc03a50928c20ac964afa09718
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly flagged this PDF as malicious. The presence of a 'download button' heuristic suggests a lure to encourage user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/123?keyword=aiea+intermediate+school+hawaii In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8fa59a04427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_5f9b542f8c348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5f8eeb91343cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5f90f8f87931e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f95abf762a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f89693824cca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_5f9df938d270a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f87ca0f15b00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8928027cecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5f937983ca710.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/b318b32a-5a43-4f46-8b27-c9045b80e8cc/free_bookrags_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/energy_concepts_the_physics_classroom_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b723a7-5d32-4a03-aa2b-8469c52614ee/72721942345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454dbf9b-aa51-4d1e-86bc-a055ccdd566e/18140233141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754a3ebb-5972-45ef-81ca-8a40defa0c77/zuzujadupixumemiwotevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a498619b-f307-446c-a2b9-de872789cfd9/zuxikezip.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_off0000643d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643D 7952 bytes
SHA-256: 7eec5435cab1720e7c7e034ca4c00de8600ac5b7f7c2dcd6135c7d52c7eec49c
font_01_sfnt_off00007eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB4 5260 bytes
SHA-256: cda387d7b3372a06bc1f7bcecbd01fc8981a50caf889240328505496aa774019
font_02_sfnt_off0000907f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907F 10748 bytes
SHA-256: e4666f6659a60c07995dd66d82d7a63bb22e4401614137dbbe758f6eb89f43a5

Open this report in the interactive analyzer, or submit your own file for analysis.