Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2e0dc2d26414b0…

MALICIOUS

PDF

39.2 KB Created: 2020-10-07 16:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a8dbbc999ad2cbaf03bf8ca1bb5446f8 SHA-1: 920e39092ca6af5bfd1f6a49814d04f414483af1 SHA-256: ba2e0dc2d26414b0f4a40d621720a7c7081387e504d441d8b89ebf9c6d1df395
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://gettraff.ru/pify?keyword=birmingham+theological+seminary+schedule In PDF document text
    • http://files.keepingupwithk.com/uploads/1/3/1/3/131398242/tasudome.pdfIn PDF document text
    • http://jonulebej.rhdestinygroup.com/uploads/1/3/1/6/131606615/bekanamoditiju_womak_tubil.pdfIn PDF document text
    • http://zeduvisas.cmeasbs.com/uploads/1/3/1/6/131636648/xofurilifolo.pdfIn PDF document text
    • https://site-1038636.mozfiles.com/files/1038636/lotekakulizizikob.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/39379920465.pdfIn PDF document text
    • https://site-1036625.mozfiles.com/files/1036625/27636529358.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8107/0747/files/crestwood_school_district.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/41333256610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2753/2442/files/dsw_mens_dress_shoes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9020/6101/files/library_administration_and_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6858/2809/files/10122305652.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_off00005984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5984 5504 bytes
SHA-256: cb505ba9bc18204fbacec9f2952267412c7fc02d46838cdc2bbac0c0dbf53781
font_01_sfnt_off00006c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C13 10616 bytes
SHA-256: 200ab04108b6ae29c132bc3a3bd181f74ec2f16870464d102f4caf6f039e5a5e