Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9883c59466b6dd9…

MALICIOUS

PDF

45.3 KB Created: 2020-10-02 10:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 593ba17353c29a34da27c2dcd8f27224 SHA-1: 70a266e8eb281d4d28705a8b510bad55c1434cdb SHA-256: a9883c59466b6dd9cb02e327271cc9ec8fc8ff22b81f4e11e1a2f4de49eec4af
184 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.
  • 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.club/pify?keyword=giraffes+can%2527t+dance+lesson+plan+growth+mindset In PDF document text
    • https://site-1036945.mozfiles.com/files/1036945/87811727463.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/45754024536.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/jediwal.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/wigatagapojomorotixav.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/10360370416.pdfIn PDF document text
    • http://files.steamkingclean.com/uploads/1/3/0/8/130874066/lifigubibuje.pdfIn PDF document text
    • http://files.gracehouseministry.com/uploads/1/3/0/7/130775063/50f5e014119.pdfIn PDF document text
    • http://buzora.sarabaloughdesigns.com/uploads/1/3/1/8/131856278/6668e.pdfIn PDF document text
    • http://files.openstudiocatskill.com/uploads/1/3/1/3/131384284/5a7a9b8fb48.pdfIn PDF document text
    • http://files.nestrest.com.au/uploads/1/3/1/1/131163559/geliluzebixogolasale.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/9b1e8965-da61-4c8f-a5e5-9e5c8bfc1ad7/15359558838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897f31a5-5db9-47e0-a5e8-041775d3bff5/kelavenuwojizudorepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c663c10d-d240-4d51-ac82-c5415627b607/gugipubupegar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/jakab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5463/3638/files/28364393436.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_off0000722b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722B 5724 bytes
SHA-256: 3494bf2b17b02754595bcc6b13fcba60bf5a7f5ff4141e51c2014529b5469ed7
font_01_sfnt_off0000859b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859B 10080 bytes
SHA-256: fdbc3baa4d96db2e014c0bffb629a75cb7515edef94727d0ff763ec3224d7787

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