Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3dc03a007dc3fe2…

MALICIOUS

PDF

45.0 KB Created: 2020-10-08 21:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 241a2208c2d7369f68c30768fec63b90 SHA-1: cb8de7fc3cfe882c1e4b92ace9355bd8f327fb0f SHA-256: b3dc03a007dc3fe2d7e9ee491d69eb584080096234e2f77d8130d35b10905e60
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.link/pify?keyword=old+town+twin+heron+sunrise In PDF document text
    • http://ziferawi.easy-editor.com/uploads/1/3/1/4/131453251/wepilunepul.pdfIn PDF document text
    • http://voxodafir.seedsofwisdomschool.org/uploads/1/3/1/0/131070161/0cdffe395d.pdfIn PDF document text
    • http://files.thehutchgroup.net/uploads/1/3/0/7/130738696/zazakika.pdfIn PDF document text
    • http://files.arupakaai.com/uploads/1/3/1/4/131454586/mosoripob_fokudoju.pdfIn PDF document text
    • http://xejejaba.cristinanoelfrias.com/uploads/1/3/1/3/131382257/a378a573b32c1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e48d425-8670-4b96-8134-bb4a5846dc20/laror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f52ddd-46d1-40d3-8dea-d88e2167015c/82269559034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd5f07d-af44-4393-b1dd-1aa7cb8aee1f/71863601585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bcdb063-8a19-4693-a12d-cf2f503b13a0/fanaropiresubisag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed34604-f6a4-4e38-8cc7-718b2cc148b2/6946394146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfa7ec4-5608-4aa5-901b-f41da734e9ff/sorumap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede1ce91-fdf0-4dcf-afcd-8bf3bb72b326/57529282701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4442ec39-5ccd-4487-b0d3-1687dc12dc05/55952504179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c0230c-4ddd-4055-91a8-3d19ed9a65d3/pexalagapofegaro.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_off000066ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EA 4824 bytes
SHA-256: a0b4a194c377a374e352cb117d1e898ca024ccac23e3c7fa2fd1777a3444efa8
font_01_sfnt_off00007757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 14464 bytes
SHA-256: 0f41ba36e37821eb56d30e889260bf821f438ee30d74046db07f41cad26d2b9c

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