Malicious PDF — malware analysis report

Static analysis result for SHA-256 569964eb6af35b67…

MALICIOUS

PDF

34.9 KB Created: 2020-11-04 00:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4794f6c4bb1f3d6e0261675dcd1a2e57 SHA-1: eab08992f0037517c55c6416a72f0773dcfd8303 SHA-256: 569964eb6af35b67881cc8886de2adf4d1e6d5a46d06f7aee32937139bdb52f4
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a link farm hosted on disposable domains, a common tactic for SEO poisoning and redirecting users to malicious sites. The primary link found in the document body, 'https://ttraff.com/123?keyword=fisher+scientific+isotemp+2001', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=fisher+scientific+isotemp+2001 In PDF document text
    • https://polivepuba.weebly.com/uploads/1/3/4/5/134582029/xinegegetevasiluxi.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/0d47913441.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/5048154.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/telimuluzapetubidemu.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/nikudijateraji-mopuwamaxuro-zulewanadas-zavinili.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/nimovafoladux.pdfIn PDF document text
    • https://wibiwiterudek.weebly.com/uploads/1/3/4/3/134373050/jebavut-zederevisi-zizuniwo.pdfIn PDF document text
    • https://wadozivapo.weebly.com/uploads/1/3/4/5/134512268/2574141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/xekikekiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153f36fe-acc1-4b38-936f-b46be24e293a/fscapture_for_mac.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_off000046a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A2 5296 bytes
SHA-256: 779c39c926cd7b7b3b91bfbf8422edc879afe1abe014eb5cd21e4e6510ce3569
font_01_sfnt_off0000588a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x588A 12600 bytes
SHA-256: 1b7bc7582a640e9be877de86e109249c7e210eb63a3544182692bd97ae56e3ec

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