Malicious PDF — malware analysis report

Static analysis result for SHA-256 415b9772d3cdf774…

MALICIOUS

PDF

44.3 KB Created: 2020-09-30 13:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7ab6def65020dd3c712e00ba3b872696 SHA-1: dd5d65376aec214847ef47f5f142ca86537bc79e SHA-256: 415b9772d3cdf774b018230b8c291ccac48e270779522ed1f98e3b500f71e2c6
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://cctraff.ru/strik?keyword=marketing+management+pdf+project In PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/25241157519.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/gewawumojofarozaxosupis.pdfIn PDF document text
    • http://files.heatherhofstetter.com/uploads/1/3/1/4/131407469/vamodovetop.pdfIn PDF document text
    • http://dixaxewim.bigprint.org.uk/uploads/1/3/1/6/131606289/871813.pdfIn PDF document text
    • http://files.conwaysound.com/uploads/1/3/2/7/132710694/vokuduwud.pdfIn PDF document text
    • http://zemurufig.samkaestner.com/uploads/1/3/0/7/130739088/2537125.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/faceceff-8314-4406-a60a-47e16298849e/49641773206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b141468-2c71-403b-828f-899321188bda/34388629486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b36f92-ca44-455a-9638-5cb6298f458d/pasogorevifusajubewatob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84f68b6-69ab-44bb-a150-2654c928a3b5/53373940433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7000/5156/files/schwartz_surgery_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/gowanesetarerulev.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_off00006d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D99 5412 bytes
SHA-256: 105c826e134a4762a5ad4dbbb28b923a29e2c1331a7e9ac7955c0af59a3cd5ab
font_01_sfnt_off00008009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8009 10544 bytes
SHA-256: d5b53f81e52f50d052e1b8eae019662dead7609a8a46d41e77c7f28cade0d29f