Malicious PDF — malware analysis report

Static analysis result for SHA-256 994162c4b68664af…

MALICIOUS

PDF

44.1 KB Created: 2020-10-07 03:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 20d43e961c82b52a3c1f418d34cd22c2 SHA-1: 7470f4d161e004a1ec94e1a27f29c6b0a690bc2d SHA-256: 994162c4b68664afedb9bc3fb2de08524a29354126a636bec3a4f4864aea5cdf
124 Risk Score

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://ttraff.link/pify?keyword=suzanne+britt+neat+vs+sloppy+summary In PDF document text
    • http://files.thinkanomalous.com/uploads/1/3/2/7/132710787/nejugo_fetaxen_vijixer_nujogutoninuj.pdfIn PDF document text
    • http://files.michellescreations.shop/uploads/1/3/1/3/131398148/jaganilavetib.pdfIn PDF document text
    • http://files.marisatorigginoyoga.com/uploads/1/3/2/6/132695571/fovimezakefes.pdfIn PDF document text
    • http://files.proteus-inc.org/uploads/1/3/1/3/131383377/126941.pdfIn PDF document text
    • http://files.itsgoingtobegreat.org/uploads/1/3/1/4/131406365/5492253.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/66868344170.pdfIn PDF document text
    • https://site-1038414.mozfiles.com/files/1038414/58836249981.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/b696e5d5-ef01-49b6-8337-06a3df41519d/71980534616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef8c3fe-1617-4d95-b60d-b525dbf80736/barurorupanutasabapadaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39e56ed-9ad6-49e2-96ae-72e7346d7d88/mevezivagevizika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4487/files/vt_rifle_season.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6773/5715/files/dmv_jersey_city_timings.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_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 5300 bytes
SHA-256: f546442e481ec5f2c559fb951d67ffd3c73f740339c5381ba0608bc655a57759
font_01_sfnt_off000073bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BC 9804 bytes
SHA-256: 31055b8e98cc50109c8501213e8552bb546130f4adbabbcfef51584500dbe94b
font_02_sfnt_off0000955d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x955D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2