Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebea5c9fbe1dfa6a…

MALICIOUS

PDF

113.2 KB Created: 2020-10-05 13:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 21b253435a3778b5bbbe134d60083c19 SHA-1: 975cd377bad19404fbafdef3104d51143b6649d1 SHA-256: ebea5c9fbe1dfa6a23184f0f7b293e178de7af1b6c4b0e1c77aec8b9c45158ce
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded links that point to known malicious redirector infrastructure, specifically `https://cctraff.ru/strik?keyword=aveyond+lost+orb+walkthrough`. The document body, though heavily obfuscated, contains references to a game walkthrough, suggesting a social engineering lure. The ML classifier strongly indicated maliciousness, and the PDF structure itself was flagged for linking to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=aveyond+lost+orb+walkthrough In PDF document text
    • https://site-1039489.mozfiles.com/files/1039489/xalawosotusosokuxiwonekib.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/57176592694.pdfIn PDF document text
    • https://site-1038703.mozfiles.com/files/1038703/zupetojipav.pdfIn PDF document text
    • https://site-1040317.mozfiles.com/files/1040317/25183406856.pdfIn PDF document text
    • https://site-1039356.mozfiles.com/files/1039356/tubofosufexomod.pdfIn PDF document text
    • http://files.sunsetforhope.org/uploads/1/3/2/6/132695720/torubunimo.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/912fe518-5da5-426d-8c8d-3e230d7384d3/tukagivez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/028c1b47-b653-45b6-b57d-a6ed2d6a292b/90162038475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031b8396-82d9-4669-8809-cb6cfe06e10b/vokawomawixuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/portable_air_conditioner_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2451/7790/files/fnaf_2_night_5_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9784/4637/files/how_to_reset_asus_router_to_default.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_off00018104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18104 5536 bytes
SHA-256: 64a1445e221ebad0b1a6cbf02b3212aab0a9ccf4ecf1d7e05ddc7db7f1f3fb5b
font_01_sfnt_off000193ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193EA 10636 bytes
SHA-256: f0ae9db902ed28345020132e5c5fc20c16167782e7bd8d7393485778c381415d

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