Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9dfd0eca477ba47…

MALICIOUS

PDF

45.0 KB Created: 2020-10-28 19:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ecb05bcf5af01b4e81c8b618d6b653a8 SHA-1: 17f916d81baf879b75a139c6c81e4f7364eecb3c SHA-256: f9dfd0eca477ba47cb36b30963be2fd98cdf958c6490d856f0a0e1994b525b6e
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://ttraff.cc/123?keyword=inter+vivos+trust+irrevocable In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424378/normal_5f993dba8b9fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f88b6717ef7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_5f91850ca1fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5f8bff79a420c.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/tetazino/modele_cahier_de_charge_site_web.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/lowerom.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/english_grammar_tenses_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/rojumonozolivadigosilazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/ibc_bank_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a58a50-fe70-4191-ad05-308c0334608d/elementos_esenciales_de_la_organizacion_administrativa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/relugoluwasumam.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/jasagajeweselasafedutar.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/arifureta_light_novel_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0647/4420/files/driving_school_2020_old_version_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/business_ideas_in_hindi_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5888b26c-8237-46c8-a75c-d3174e27eda3/46177321754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5959/2349/files/66909530001.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/echinoderms_worksheet_answers_biology_corner.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/pdf_to_word_convert_software_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/34997846210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/8603/3311/files/zolep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3040f601-da0a-48ab-966c-acd4bc81f6ef/volvo_trucks_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/60300250211.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/serum_albumin.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/area_of_shapes_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12242ae3-d956-4464-92b4-93136898ba2a/21103287368.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_off0000737f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 4928 bytes
SHA-256: e7261b1cdd5936a63ce82cd0856c338b136c5e41513bc5a307f43eeec694c294
font_01_sfnt_off00008457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 10044 bytes
SHA-256: 5894e74206d4556f1d91cf2405658cf2a9159232143ed7768f20493b620697c6