Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7779468f4b4c45…

MALICIOUS

PDF

35.4 KB Created: 2020-10-26 05:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 1e7d36751db2995224e592aedab7c502 SHA-1: 785861b4a8332130eb8edc7a40e99ce9bbf5c58b SHA-256: ba7779468f4b4c45dc7f9162de6df5b4643a8252b9758ae28094d93d6016ffe3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/aws?keyword=ocr+a+level+biology+textbook+pdf+free In PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/zexenifeni.pdfIn PDF document text
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/1669654.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/6600921.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/xivugezalogaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000049fd.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000049fd.bin)
    • https://cdn.shopify.com/s/files/1/0268/7434/7693/files/34806264569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4732/8161/files/iift_question_paper_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1987/8567/files/ortiz_middle_school_body_found.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6785/3986/files/google_map_street_view_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/fundamentals_of_physics_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2054/4931/files/viva_tv_download_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/18072729692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8658/5250/files/tipo_de_placenta_en_perros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/watercolor_artist_magazine_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3389/8391/files/xilutomurapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7130/2553/files/52402379084.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/8751299461.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/pellegrino_artusi.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/aula_internacional_1_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/synecdoche_and_metonymy_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/47121548115.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 extracted file (font_00_sfnt_off000049fd.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49FD 5604 bytes
SHA-256: 8b85b9376f126eb486ae1457d14f8a86501dd79c0be07af16485fe8d1a64cb9b
font_01_sfnt_off00005d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D32 10280 bytes
SHA-256: 836b54b82ea6bebf46e9809837bd8364da3aa4e0902d6e45e96a451155c3e02a

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