Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1e62a31b43038a…

MALICIOUS

PDF

43.3 KB Created: 2020-10-30 07:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 510950d3ada92b9436189b61d8f3900b SHA-1: b6811019335e2739196cbac8ea1314ed09516a3d SHA-256: 5d1e62a31b43038a7ecc43666d413e5774c8475afd05057aa537efb70f1d0fca
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=sea+items+minecraft In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f897d7385fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f886bc65e130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f90892d799e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f88b23c28214.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006bae.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006bae.bin)
    • https://s3.amazonaws.com/ronatiduzoxij/11304288880.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/frecuencia_cardiaca_normal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7750/8541/files/traditions_and_encounters_3rd_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/duvafamanasigo.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/albeniz_suite_espanola.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/liweji.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/miwajubibogodokujudokopal.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/libro_cantares_mexicanos.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_off00006bae.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAE 5100 bytes
SHA-256: 3fa3dd28606cb6754ef595daaee897863217113142bffa1c1d8b013066a53ae5
font_01_sfnt_off00007cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEE 10396 bytes
SHA-256: 16e6e22c48caa84f4c078746b80434b23b05e96410de54cc36301659ed491aa4