Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fef156d91c2168…

MALICIOUS

PDF

37.6 KB Created: 2020-10-02 16:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 649e463105768e4a2ae0823d512cbff1 SHA-1: 67d9659210d5f7c492d0eb84d78168cd3f914c61 SHA-256: 69fef156d91c21684530eb2cd2609bcf6bfbf8ad6debfa49452e637e67dae8d7
94 Risk Score

Malware Insights

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

The PDF contains a link disguised as 'The pearl chapter 2 study guide answers' which redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the embedded URL heuristic confirms it points to known malicious redirector infrastructure. While no scripts were extracted, the primary attack vector appears to be social engineering via a deceptive link.

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/strik?keyword=the+pearl+chapter+2+study+guide+answers In PDF document text
    • http://files.ktskinandaesthetics.co.uk/uploads/1/3/0/7/130775858/9283625.pdfIn PDF document text
    • http://files.tomdangofficial.com/uploads/1/3/2/6/132681033/abd4d8c.pdfIn PDF document text
    • http://files.friendsofmip.com/uploads/1/3/2/7/132740540/b2a1b2ce83eb7b6.pdfIn PDF document text
    • http://files.onlinegaycounselling.com/uploads/1/3/0/7/130739713/rojitodozov-lefuzi-dufarut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7847/0817/files/fujenowujonivuwaboxitopug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/beta_2_agonist_drugs_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0982/9795/files/pasit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9646/5823/files/61135574443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1497/9490/files/lepesulawunubipamuzuvaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02eea59a-f364-46c4-9d11-d273f5aa8dfc/zerikirusadepodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9275fb1d-37a6-441d-9eef-f9d72c66f6c6/46709191261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21309db-d347-44d9-a7da-d8033d14e311/41634133440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c863fc0d-b7db-4bf0-9215-48dddcc7a6ef/17919853491.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_off000056e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E9 5612 bytes
SHA-256: 9d74344e60c48a2ca900e83ad836e653bb9646ac6a23fa8dffee769409f031e6
font_01_sfnt_off00006a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0D 9396 bytes
SHA-256: 48372b29d3f167af592104ecbf3daa4be8e65c6a75e07c0477f720f60cada835

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