Malicious PDF — malware analysis report

Static analysis result for SHA-256 91250b67d0283664…

MALICIOUS

PDF

45.3 KB Created: 2020-10-30 14:36:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b2feb1a3f33479174b29b6b69cf76cc8 SHA-1: ea309a8f1426aa87d1ed58db3657a4b11d9fdf80 SHA-256: 91250b67d0283664427de91727bb4e623b9a4af8230845420f5fc5f0d84546de
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://gettraff.ru/aws?keyword=grace+under+pressure+tattoo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5f8e00b4e88e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_5f928024a0c70.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/nigimul/applied_multivariate_data_analysis_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd77d29-45e6-41f7-b044-b6a73fa69316/extreme_13_re-_pack_8_torrentle_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa61af9-5eb6-43c6-be80-913dcadc9441/ai_chi_exercises_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/346dc4b5-6d74-4ba1-9209-3cd1ae9db233/lotoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e63cc1-7058-4583-b737-44a09f02e24e/26590958853.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/87079749900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90a7dc8-a78b-46ca-b118-fa92d432a237/midokexixaluvik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c82a9e-e0e4-421b-a5f9-bcec782204ca/gramatica_para_la_composicion_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a495d1-ca5e-4976-b6c9-ab89dd9fec14/pabufefebese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107241ad-b53a-459d-9611-fef2aee459c7/wugoxewudosetubexajal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3193280-52ed-412b-8c22-88d5b733211a/best_srs_surgeons_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2ea2a1-c224-4c54-89b2-17355a7f76ad/83375692232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f523dda7-48aa-4abf-83fa-98b488109fac/viwivufudofamaseb.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_off00007394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7394 5068 bytes
SHA-256: 6da97890c82c39641d107afcbd19c6683e66416e5c9d530f0d41a292389ee59b
font_01_sfnt_off000084dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DD 10352 bytes
SHA-256: 116c791fd1e2df31076326cc6442e1bb127a9f072e9547f948b33c44cbc5ed11

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