Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd1d23e99ea2460…

MALICIOUS

PDF

49.5 KB Created: 2020-10-30 14:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 02e38a25a5231f7a2fd84df57eb8703e SHA-1: ed91d80e4d775d381e3f77fbfbff34e7b13e616b SHA-256: 0dd1d23e99ea24602012af1ce85ebf2c392a9ea03bee4783522a2a203c266f60
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.me/123?keyword=atando+cabos+griselda+gambaro+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f88ba8058cd8.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/felasorarabipis/definition_of_intrinsic_and_extrinsic_motivation.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/fodemapuvij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8200608-362f-402b-af68-6e09fcadee84/jisefepitim.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/rahu_kalam_today_austin.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/vizavozepujazowaruvit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9030/5958/files/zorudigifu.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/98512416813.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/student_attendance_sheet_in_excel.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_off000083c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C5 5604 bytes
SHA-256: 63ae03dd6811599c1703aa2098f8343dec2cf97de5fbaae7e6bdfcd3c461e84e
font_01_sfnt_off000096bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96BD 10392 bytes
SHA-256: ef7fc0460faaeedb42aaccfa7b229764549d634d14e449c8662e1bb30c92c1e9