Malicious PDF — malware analysis report

Static analysis result for SHA-256 f266c200313eb765…

MALICIOUS

PDF

42.1 KB Created: 2020-10-29 21:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 550e1fe7d734fea9c75fdc8e5c23181d SHA-1: 3fcd7a676cd660d5904076e9c5b0a40f8dfefcc8 SHA-256: f266c200313eb7658fbe73f22586b81529a37f9ad2394d5f57ec922ce3714998
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/123?keyword=tom%2527s+east+bay+traverse+city In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5f9090c0e9555.pdfIn PDF document text
    • http://www.toms-fIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/anabasis_of_alexander.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9416/6683/files/yahoo_mail_download_folder_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d537ac15-9163-4dc8-b9e1-281fd1abd61c/37943213716.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/zolokadigid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8247/4175/files/shellshock_live_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0427/8935/files/29161895426.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/idealism_vs_realism_in_education.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/equations_with_algebraic_fractions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2427ce-0813-4528-bcce-c65abb2cfd58/86571724217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1b8c8c-1f33-4830-867d-2ab1fc286ac1/fomupilivirolifiremetuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9f6ba2-21e8-4a76-acc6-90c18093a118/paul_reveres_ride_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8530/7297/files/82955462120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3737/4656/files/poguxaruwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56543c28-1c9d-4876-8866-978ed0482eac/63218405014.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000507e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x507E 5196 bytes
SHA-256: 25d7b11e85cf0700351d6f4be0f556275231d3b515ae01052c62054b67a88baa
font_01_sfnt_off00006228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6228 10788 bytes
SHA-256: 652a8e7bd4385761cc5d01e3ba54b8cb56e135b1a0c98703f6a8b4ba1ebd3e98
font_02_sfnt_off00008626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8626 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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