Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b44c6c2207e4793…

MALICIOUS

PDF

58.0 KB Created: 2020-11-04 20:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 00b1b4a1cfbea9980c18f86c5aed6d3d SHA-1: 87be61ca5ededdfbade91f1b11fff22de46f9302 SHA-256: 6b44c6c2207e47937a5c192b5ce156d02e167dc0ffd8dbffda8a13cf87391e9f
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely used to deliver a second-stage payload or redirect the user to a phishing site.

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=goldline+controls+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f915e68d03a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f88d7fd2251d.pdfIn PDF document text
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/908035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f9110d83b3b5.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/1/0430/9640/8218/files/7-1_practice_form_k_geometry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5490acd7-1b96-4f52-a550-e29ea6846357/fadunivikababino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e47382f-f0fa-4d76-93b4-303af8257716/21100234518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42083359-25ff-4552-8b82-4610b9bb8c77/86231756028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e747b9-92e2-46da-b92e-8fc61508874f/georgeann_hawkins_siblings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8329/3384/files/90493884986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e731a66-b4ef-4834-8fef-edeaf1b84847/chemistry_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/512123d8-b042-491e-9ef2-05bd5a42a7b3/cabal_destiny_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66134e32-af2b-41b9-8a16-a8bb74808fd7/my_girlfriend_is_a_gal_hentai.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F5 5116 bytes
SHA-256: e2c8295a126d24f92b7603a4b0913075374a9b4e5b1f0da32312e9062e711677
font_01_sfnt_off00009b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B41 11552 bytes
SHA-256: 74a95a2d3c41bfa1520f71ab116ff91508a761caf29f4a92fbacb43b47aded1f
font_02_sfnt_off0000c225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC225 17192 bytes
SHA-256: abb1f753a795c37bf7efd42704d54de85c826568b45ecc8752d502f5b2c450f9

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