Malicious PDF — malware analysis report

Static analysis result for SHA-256 38777b37d058fe02…

MALICIOUS

PDF

65.2 KB Created: 2020-11-25 07:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a52496f24708a81e458204fba330c747 SHA-1: 36c346381186f1a5478a9719a5346f4fe507ba1d SHA-256: 38777b37d058fe025929dbe11024c08b957b1787a7cb7fa68af1f1b8d3b7b8a3
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating a malicious redirector link. The embedded URL, https://gettraff.ru/strik?utm_term=list+of+lead+ins, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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?utm_term=list+of+lead+ins In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8c4b058d663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_5fa6d78e268ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5fa688bd4854a.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/xifabilejilab/gagafovosiwezukivake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1eb75bc-a383-4f3e-b586-f86acb53f100/mozuxofufabovaverij.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/avast_secure_browser_software.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/60410863136.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/hacer_bibliografia_formato_apa_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1087c805-7dec-409f-a794-b885d1ea2a41/zililigurikekafibizov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b40f48-611c-4799-a750-03f9f140a41f/zevopidawax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecec5b31-ebc3-4e6b-a65f-cdfd2d00533e/jetopib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397c6d4a-928d-430e-a76f-c5123a414862/minecraft_skins_sunglasses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c03132c1-da15-421d-aa9b-4cb66b6c6a23/juwexaxifodizora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df97ef16-8c75-4352-a4ac-fea442ac98dc/jitumulubexoroninezari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0a31e1-3eab-4e4f-aea7-949696a2c5eb/37164063661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4968e83-0f6b-46ea-bb52-59c30428ccbd/fetifogimozazewebali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc09a9b-e054-49e5-9e39-45d0fabee62a/21235326215.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_off0000c6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E1 4744 bytes
SHA-256: 1cdf8f7c54235ef571f29e30392687c861dd3125731a5a2b2985b28c2df8b85c
font_01_sfnt_off0000d71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71B 9784 bytes
SHA-256: 55f1134d0d748e84cd205f6a83ba74243bb8ac24ac6bb691f21918745f31aaf5

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