Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9acf8ab97ffd24…

MALICIOUS

PDF

49.6 KB Created: 2020-10-11 02:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 58f940ea1c678667b7a673fdac858187 SHA-1: 74b6606d0c585355068ccdf8fd0429b51117f598 SHA-256: 1e9acf8ab97ffd243aebfeb0d72e0c8784da6f3b27454f21dbedff3a894c587f
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=intensive+english+programme In PDF document text
    • http://files.villellacustomwoodworking.com/uploads/1/3/0/9/130969758/vatofekoz-ruteximefijuw.pdfIn PDF document text
    • http://rikuno.sutureconcepts.com/uploads/1/3/2/6/132681293/zupikevepazegej.pdfIn PDF document text
    • http://desupigu.retroca.com/uploads/1/3/0/7/130739892/7854976.pdfIn PDF document text
    • http://files.brigidgeorge.com/uploads/1/3/0/7/130738564/463c5.pdfIn PDF document text
    • http://tafonapa.slant.biz/uploads/1/3/0/7/130739038/397095d0887f1c0.pdfIn PDF document text
    • http://vurugomo.elizabethmathie.com/uploads/1/3/1/1/131164250/21203087.pdfIn PDF document text
    • http://files.capturedbyecp.com/uploads/1/3/2/7/132740649/97908.pdfIn PDF document text
    • http://files.anchoredinrowayton.com/uploads/1/3/2/7/132740949/gidefejanosolo_damevimoruzojok.pdfIn PDF document text
    • http://jotutu.rossbrownscience.com/uploads/1/3/0/7/130739377/dumumozugetatoxoruki.pdfIn PDF document text
    • http://files.thelongpaddock.net/uploads/1/3/1/4/131406849/rabukikafidupi.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/d05475f3-2ad7-4c46-a7d6-f21de6a3600f/jixekidugovi.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_off00008625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8625 5228 bytes
SHA-256: f4e047eb02a52097ea860e17e66f919829e2f09051d7d3b36b0925868a4aff8b
font_01_sfnt_off000097c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C5 10076 bytes
SHA-256: 875b389a73daffae927a71ce57b47b9edcaa4038b2fd2e87c787c8c1679d6c7e