Malicious PDF — malware analysis report

Static analysis result for SHA-256 7515f3a3c397cef8…

MALICIOUS

PDF

44.1 KB Created: 2020-10-25 10:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 8da4b0540fbabf80066399cd32285f1c SHA-1: f044a54b0e791276c4487c702fbb6f3663a8fadc SHA-256: 7515f3a3c397cef803c70ce894d82a1544d8177f4e70d368aebfd601a83deaec
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.link/123?keyword=icy+veins+fury+warrior+dps+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f91956d7c8ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f8fca54a6def.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f8c13d55725d.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/tadovu/27054389380.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/nofagako.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/walking_dead_all_out_war_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/65718129963.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/bacterias_fermentadoras_de_lactosa.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/idbi_bank_exam_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/pathophysiology_of_diarrhoea.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/la_orden_de_los_caballeros_templarios.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/ncert_books_notes_in_hindi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ee152f-5570-4bcd-8a69-dc4010ffe45f/ruzijedefajofanerorajajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2849412-83ab-4e64-bb2a-7a9671f0841b/libro_de_matematicas_de_1_de_secundaria_editorial_castillo_contestado.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/design_as_art_bruno_munari_download.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/cds_exam_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/gotozogofexigaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/understanding_the_linux_kernel_4th_edition_download.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_off00006d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0D 5480 bytes
SHA-256: 0a4bfb41ad4e92aea2739ae80c303082061d9271d9bc30d465fe542f5180b73f
font_01_sfnt_off00007fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE8 10368 bytes
SHA-256: 5db45778fd8aaa582d1b57a0f37fa7a45c7baa02ebe003a3cc9cf1b721025ffb

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