Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea94c10c31567fd2…

MALICIOUS

PDF

44.5 KB Created: 2020-10-29 23:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dc70692e22d2f020946f22819588ce21 SHA-1: 17dcb45db66c088e56af9e082fb042cf4af7027c SHA-256: ea94c10c31567fd23596d5386118bf8b9dceeb87032e9bfd3e1137d602d8f59e
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=consumer+behavior+ebook+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's intended to trick the user into visiting a malicious site under the guise of downloading an ebook. The ML classifier also strongly flagged this PDF as malicious.

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=consumer+behavior+ebook+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5f8c4dcb67144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374368/normal_5f8b04d68f1f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_5f8b174ef31a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/coretta_scott_king_award_winners_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6713/6407/files/99172300450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/wawosogakedufebidexoliz.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/hiv_aids_awareness_prevention_treatment_and_services_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7494/4671/files/neonatal_cholestasis_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/694a6c32-45be-44c5-a6cf-6d4a4cc5d0bd/lord_i_need_you_sheet_music_satb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 5336 bytes
SHA-256: 7036d9bffb45a05cbf3b972b8a50743ad58bdf685bbb243f7bd4e6bcf56c37bc
font_01_sfnt_off000073fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FE 10476 bytes
SHA-256: 386abc36beb207303ba8568ab10dda35cca564398456069a6f24522e0adaaed5
font_02_sfnt_off000097ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2