Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ffaa28b3186b7c0…

MALICIOUS

PDF

36.6 KB Created: 2020-10-05 15:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 83d4d5131393aaab9af8d084a767ef50 SHA-1: e5bb2a699d848fd9402810b8fa523007620c6770 SHA-256: 5ffaa28b3186b7c0c004da7224c7445a10e27da750c20496a386b3c2cc5b60f2
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://cctraff.ru/strik?keyword=papa+noel+para+imprimir+y+colorear In PDF document text
    • https://site-1038777.mozfiles.com/files/1038777/50361799175.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/66108091039.pdfIn PDF document text
    • https://site-1039143.mozfiles.com/files/1039143/94765955852.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/wozosofomobabevizuxolaxe.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/94542933127.pdfIn PDF document text
    • http://files.alsiphotography.com/uploads/1/3/1/8/131871778/3872018.pdfIn PDF document text
    • http://wibamud.fizzbathco.com/uploads/1/3/1/3/131398455/6481256.pdfIn PDF document text
    • http://lukis.calvarybaptistwinamac.org/uploads/1/3/0/7/130740190/bigivurixiposalali.pdfIn PDF document text
    • http://fabudirif.lvoars.com/uploads/1/3/1/4/131437079/vumuvowekeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/55486929563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2069/9813/files/roads_of_rome_free_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/amazon_panasonic_rx-d55gc-k.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/tubemate_apk_uptodown_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9151/6310/files/9861355013.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_off0000513e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x513E 5004 bytes
SHA-256: 9a964792e561318a388e02f5413e2a19135196cab1925ddb6a997463b8942cca
font_01_sfnt_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 10248 bytes
SHA-256: 5033ecea771c6c96a929aad25673cfa29129f72d9548dd4e9465abb797695d58

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