Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f22b6e4a54a9b4…

MALICIOUS

PDF

43.7 KB Created: 2020-10-27 09:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0342271f8f40028a2e81c21c3aaca160 SHA-1: 9e6b96555694ac1ed7e26bca885e888ceddcf029 SHA-256: 33f22b6e4a54a9b41427a7d8aa89c1f1a53afecce93b34ad699f45460ab9eba6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body text, though partially obfuscated, includes the URL and appears to be a lure. The ML classifier also strongly indicated maliciousness.

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.com/123?keyword=maui+cable+channel+guide In PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/gagagosonarobes.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/5e616607ed.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/laxubekigelenuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f872136e2636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f94d22ee44cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f8b2cc0da131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f91d26bc5339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8811984c989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8e505599464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5f95f5f0f1511.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/1/0428/5153/2963/files/middle_school_cheers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8243/9584/files/types_of_conflict_worksheet_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5483/4079/files/pediatrics_and_neonatology_in_focus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8070/6967/files/92678777830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/siva_puranam_in_malayalam_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/analytical_method_development_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/calculus_cheat_sheet_derivatives_and_integrals.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/mathematical_statistics_by_gupta_and_kapoor.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/mapa_de_angola.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/incomplete_abortion.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/likizidotu.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_off00006c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 5072 bytes
SHA-256: 1fba8ef203abe7e8014607827f0a90cb77f30ca89a8a691464092040771a2ff5
font_01_sfnt_off00007d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4E 10592 bytes
SHA-256: 15f4b4a62f6af3c4a838eb272f640d830a2265b3dfccfd2af4b6b60cbcaa5bd6

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