Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8a41f05b70a147…

MALICIOUS

PDF

40.6 KB Created: 2020-10-07 17:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d0e755d98cedd79c51fcde90bf3d246a SHA-1: 1395e7387811f69815af2b86b2a2ab1a908f8ccb SHA-256: ca8a41f05b70a147c2fdff49f3df4701c023f400b6da8cf1967d8c06ab70b8b2
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=the+exorcist+full+movie+download+filmyzilla In PDF document text
    • http://dibefa.windhorsedancer.com/uploads/1/3/0/7/130738799/5107758.pdfIn PDF document text
    • http://files.awesomebookreviews.com/uploads/1/3/1/3/131383698/kakepebuwumuzizo.pdfIn PDF document text
    • http://loper.shinyobjectsvintage.com/uploads/1/3/0/7/130739663/bipuruluran.pdfIn PDF document text
    • http://files.benkirkefamily.com/uploads/1/3/0/7/130739544/maruvetagarijaji.pdfIn PDF document text
    • http://files.alisciayoung.com/uploads/1/3/0/7/130775011/mutixiwifew.pdfIn PDF document text
    • http://vudotuvo.foreverlivingdeliciously.com/uploads/1/3/0/9/130969926/nabege.pdfIn PDF document text
    • http://files.mikecurtisfootball.com/uploads/1/3/1/4/131410007/lamisuz.pdfIn PDF document text
    • http://files.teraflare.net/uploads/1/3/0/8/130813357/kaguj-kovafarof-wajopilegale.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/e616f5bf-2463-4cda-879e-b94e99d49f83/nupejirezumokokegukel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f646d742-b3c6-4159-a517-fb1079b7f0de/6746261334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e32d24d-b6f6-497c-9cbb-77cc44d8c85a/81745930647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80c9761-a572-44f3-a761-0d6c3d377a70/4536797811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0091/3310/files/eve_anna_carey_espaol.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_off00005041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5041 5464 bytes
SHA-256: 959a83a055ab5695fff8c329f0e6c935dae0e3a3a5f6246004238f04300fb6b2
font_01_sfnt_off000062cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CD 10740 bytes
SHA-256: 5fa76106ca5e46d72d10f696e4d6c7b16ffb476c440dff9fcede3f6b7819208d
font_02_sfnt_off00008759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8759 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f