Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dbda2be8f70230…

MALICIOUS

PDF

47.1 KB Created: 2020-07-31 21:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 700a8abbcd4c042cff7b2598239ee0ad SHA-1: 9f2fda1619ee79185d9a45aa5f316caa5598542b SHA-256: 10dbda2be8f70230145a8b8fb511f44801120c983b52a0c5479e2dbd13029e99
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.com/pify?keyword=alter+ego+vst In PDF document text
    • http://files.christinecarson.com/uploads/1/3/0/8/130813364/kotubasajigelige.pdfIn PDF document text
    • http://files.stmark-lutheran.org/uploads/1/3/0/8/130814926/wubotemovenibeb-vudefejusefajav-vipupijawu.pdfIn PDF document text
    • http://files.westminstermedicalclinic.com/uploads/1/3/2/6/132681556/5996761.pdfIn PDF document text
    • http://files.karenhalpern.net/uploads/1/3/1/3/131380308/fuwik.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/1/0435/2661/9288/files/fatebenefupipanixebepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/88635863703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/25885465597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/difivitexulasumaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/72418827704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/56885680238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/98246311699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/bonawoxuzunaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/sepuwiditiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesani.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E54 4140 bytes
SHA-256: e78f40647ec370b6959493871d29287f6807e1d1dbabfb0e1bd4af0d33b1b1b5
font_01_sfnt_off00007ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE3 4692 bytes
SHA-256: 97036dc347d8dd05ca678daf87f6bbdda606643ea0d2801f1d8fd6aa5ba16c24
font_02_sfnt_off00008cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF6 10156 bytes
SHA-256: 6951def12d976c75da3a46dc255fcf386c1666ddbf3ebe69a1110fa362aab08d

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