Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1d44f45ddb115e…

MALICIOUS

PDF

35.1 KB Created: 2020-10-26 18:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5d1901a0e4a17b8310371221758312cc SHA-1: def414181dc10f70ba1c8071d069f177f073feb2 SHA-256: 3d1d44f45ddb115e8adbaeb4482a39b36e6f5a7bd044b4489f46010657f68683
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.me/123?keyword=cool+math+games+gun+mayhem+2 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wilugugo/95658403375.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/antibiotics_for_dental_infections.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/cbse_syllabus_for_class_11_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/st_caste_list_in_andhra_pradesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b46f154-f97b-4576-aa3a-e9daaa498edd/vizewasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1c3094-8006-4e0f-80a6-180019b1d4c0/75713926690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbf7ae6-a6c6-4ca1-8b76-45da5d031174/tesule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36ecb5e6-6a7c-41ce-aba5-e20c3ab45d90/50866862735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66706145-f7d1-48b3-9b05-6dcffdc51b2f/68298450769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883c7baa-f46e-41c3-ade7-4aa21d2cabfe/gofovikusupifojumalobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ff34af-8c83-4ca8-af66-46127316c59e/bontrager_radiographic_positioning_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16e6972-b660-48a2-8984-4c20cbbf8630/fatimimitote.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/85122700852.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/hidden_technical_debt_in_machine_learning_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/5082235758.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/63689716743.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/fedezadi.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/tefigugefude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c2868c-daee-4d51-8afe-a1c1bd145254/tuxufuluguralanir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/846236e4-3565-40c3-a4f1-6cb07cd6da00/wufis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d72f5b-2431-4d0e-bf9f-30c1151bb273/39687934300.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_off00004dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD8 5140 bytes
SHA-256: 05c60a0ba220273bc665e573ba66baf31178dd5f4a9affefced05ee44caa075a
font_01_sfnt_off00005f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F42 9216 bytes
SHA-256: 5ed79c1fe1320c43040361644a58bbe0fecd4b820c86e307a4a2e1399bbb3177

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