Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb5318d135f9243…

MALICIOUS

PDF

56.4 KB Created: 2020-10-02 20:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 173dda5cc1003a60eab066cae61cfeda SHA-1: 8957f4c6f1d6298cc44d575236b68a4c36346a74 SHA-256: 1fb5318d135f92434d4e9637533fd5578edad70142c0dc3f4bb2a24522cf60ca
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://ggtraff.ru/strik?keyword=interfaz+de+presentaciones+electronicas In PDF document text
    • http://files.gallery1515.com/uploads/1/3/2/6/132681401/5334727.pdfIn PDF document text
    • http://zotibaka.wrkimages.com/uploads/1/3/2/7/132710780/445233.pdfIn PDF document text
    • http://files.stumpysconcessions.com/uploads/1/3/1/4/131437370/5099ed7d3f83.pdfIn PDF document text
    • https://site-1037114.mozfiles.com/files/1037114/fadosenowon.pdfIn PDF document text
    • https://site-1038798.mozfiles.com/files/1038798/fenujibexok.pdfIn PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/banobuborisibaxa.pdfIn PDF document text
    • https://site-1037886.mozfiles.com/files/1037886/22282231658.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a49bda4f-1ad7-451a-a16e-7d7d48bafa17/punopeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84dcda4-642e-4605-a58f-09e60ca35f10/25989398735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c378d6-3f6e-4007-a485-8ec5315d74fc/95551108779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2f6837-933c-4b33-8b03-80d93bc3ed26/13249234822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d661f5-473b-4dc4-b332-d787ddd20e30/39156977329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/tewadimulotagonujebofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0112/1432/files/nolejipizilejotigudedaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/12832212929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/91410394211.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_off00008ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFC 4924 bytes
SHA-256: 9e20b032aedc8403dc3c6be3bd78ec49ec844d72644e04e5d9e142246e2db87a
font_01_sfnt_off0000a0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0BF 10888 bytes
SHA-256: 8ccf66d7117be1e7a5afb6144408d7d035b753e2fb91db3f6d8bbd4588cb70a2
font_02_sfnt_off0000c45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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