Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6a8327d3356e42…

MALICIOUS

PDF

44.2 KB Created: 2020-10-03 22:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: daf031f4bdafba2b92cde8f27b841307 SHA-1: ae33f32fdfcad63ba8a389643c528b5d3f46ea9e SHA-256: 0a6a8327d3356e421da54bb90f07950d3821fa09f4aed6ebabd4142a21cff566
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.club/pify?keyword=plotting+linear+graphs+worksheet In PDF document text
    • https://site-1038784.mozfiles.com/files/1038784/purokutofakefijanopufalet.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/76531802555.pdfIn PDF document text
    • https://site-1036918.mozfiles.com/files/1036918/30080663243.pdfIn PDF document text
    • http://bilisi.thegoodlifeheatons.com/uploads/1/3/2/7/132740813/miwapim.pdfIn PDF document text
    • http://files.lcrsc.com/uploads/1/3/2/6/132681559/guxatezatonof_ruxogowewu.pdfIn PDF document text
    • http://files.mybrightwords.com/uploads/1/3/1/4/131438541/fasefuxos-mobelodixitij.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/02eebcb9-323c-4add-8883-e5b56d749528/19195735522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4119a405-b1a6-4908-a1d7-b52674d0f3c1/vubaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43cb38d5-c47e-49f5-98ca-01f84cc11679/juxajegukenikuzamerub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec81bbf-8b1f-4f28-864d-e82b6159e099/girepukusuriz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8adcd0fb-2972-4aed-9a40-121d70c831b9/23226905623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c9cceb-db5a-4dd2-9ec1-6cb32d15e914/zufevevegilibiwuxiwodap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d1e6de-0ebb-4494-ab77-e32c69ed251d/39753390836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6add1451-66fb-4dce-99d1-707e952a9d8d/negipigoxoveromofixe.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_off00006f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0D 5236 bytes
SHA-256: 71e94580adc2654a8752523e91730e059e620e1226bf2a4cf437748bde43fe26
font_01_sfnt_off000080ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80EE 10256 bytes
SHA-256: 2350a37325dd427382bb699ce8e8659b20e7351e002145b97235e6670c86342d

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