Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce47a1bbd52f334a…

MALICIOUS

PDF

42.5 KB Created: 2020-10-25 07:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: c8e63572c9cf90407a9b5166f59e6bba SHA-1: 905aa4d3189d704c4caa0f5b758d6ec7780d4b28 SHA-256: ce47a1bbd52f334afabaf53b1777627836302b057af109bded0b982e33d08388
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/aws?keyword=phonics+cvc+worksheets+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f8873a59dd8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f93cce057013.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/gizosarog.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/dusoluzikufun.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/32b82.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/06aef67d-a3c6-496c-b790-254689c99063/2343071443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfde7ec2-9b5b-4a60-8d17-8e873a3b61ef/bakabomuzumujaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e63407c-2052-4600-abe1-cb090bf46646/kapavefejakekinexejubawi.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/83757981715.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/4646732439.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/criminal_law_books_in_zambia.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/votutipivanipe.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/generate417_barcode_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e8a08b-6df1-4a6f-9ba1-606ce0a86378/22602425135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13127e0a-0f2c-47f7-9ccd-1c0971eefd85/25204556539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f360368b-ec6b-43d0-9971-54a73235fdc3/ready_player_one_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d2c9f1-5e06-4ac7-835d-5333d1133e47/bimibuletulopozodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d8a662-5748-4e12-9031-1da865978106/xuzoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a457a09-7212-4eaa-a08e-5a2e28b01583/xebugoxajegisoxutofazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed96f444-994d-45a6-953a-058ce5aaae03/pipibuzonap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2f753b-f6c4-4938-8a67-2f0ac7b83244/bixasi.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_off0000660b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660B 5220 bytes
SHA-256: 5505a9d53765ea41b470f23ff3902305ce16c41a1a6e13bce67449a44fafde09
font_01_sfnt_off000077e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 10868 bytes
SHA-256: 6573b1c8913c07427d6333256fbe89fc54cfb8dfefbdcc11854c654062de064b

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