Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b965bb8b66110f5…

MALICIOUS

PDF

37.4 KB Created: 2020-10-25 10:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 09603bad391975206ca25d4ea2475f53 SHA-1: fe5e5cf90b38acc5f470e481eee168b90b46623e SHA-256: 7b965bb8b66110f50964b7b6482bbc48bb5bfff34b1ee82d5eedf2bdf5215579
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.me/aws?keyword=lonely+planet+india+magazine+pdf In PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/8803206.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/50a77143625eb.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/fasibob.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000051ff.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000051ff.bin)
    • https://uploads.strikinglycdn.com/files/905a59a1-d087-4bb3-b316-e46f4e6aeaa0/logo_stps_png.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba2ea1c0-e7c8-455a-896c-64c67026d6ea/74832684699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816890b0-b6b9-4ab2-8e74-d3ae071b0d38/15433148341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6e5138-bf2f-4ae0-ab4a-0c939251470a/57899315033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2147/8299/files/to_kill_a_mockingbird_handouts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9725/0711/files/torokumin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7990/4679/files/pokemon_trading_card_game_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/andhra_pradesh_tourist_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/roman_catholic_symbols_and_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240c99fd-7880-4e08-b009-bcab602c45f4/pudef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f2b709-5a00-4c2a-963f-d1cdc7a2d2b7/is_amazon_cloud_drive_encrypted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fc58fc-299e-4912-a3e4-593178b43b07/fiselujike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a94756-0800-4608-8c71-e3eaa1343d1a/puxetiladizodagizarex.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/sleeping_beauty_waltz_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/acuerdo_comercial_definicion.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_off000051ff.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FF 5180 bytes
SHA-256: 16d39b86ff8489187375a681cc86825be8d8c913c62252e1ecba8725e3041b40
font_01_sfnt_off000063b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 10972 bytes
SHA-256: 3456449e32509512d906911e2e8e704d376797db8619e9ec7d13787d89754c12