Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ff97c752b8343d…

MALICIOUS

PDF

43.2 KB Created: 2020-10-27 01:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 013e4bd1ad2cd9790a2be8e240754439 SHA-1: acf568e2a87bf1e8e89b4a4590fe3d1eb2569eaf SHA-256: 65ff97c752b8343d0bc9663b4cd05d3f017ff199a40c12c7461f5fc2eb0aeb37
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.link/pify?keyword=overhead+projector+sheets+face+shield In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f8b0278d5b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5f8d0b5f2e33b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8b3822db44d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_5f91cecf71c8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_5f938a079b58c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f87f31c7fdd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5f9353c997935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f949007c9b54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f8f9384d5e29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8d99d6f267a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f8761e6ad7bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006a7a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006a7a.bin)
    • https://cdn.shopify.com/s/files/1/0268/8247/4181/files/blank_china_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1925/3922/files/favedil.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/kovijinumitifexema.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/jamuxekenizoregopogim.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/ridawabovonu.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/8458557269.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/23390671501.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 extracted file (font_00_sfnt_off00006a7a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7A 5404 bytes
SHA-256: 5093d4a5ba991e3a873c0baddb0c22d8e71f36f84da550649ae03ace92580bbc
font_01_sfnt_off00007ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE9 10264 bytes
SHA-256: 97db03f80a14fbfd26d977da282565abe4de22a150d2fddffc143d3af6709160