Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ffacd7e4a56030…

MALICIOUS

PDF

48.6 KB Created: 2020-11-03 18:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a4cfb8439eb43d62fc4d332328e21e99 SHA-1: 50f17ede391efc1a20bbff64b6264c47ce2af29e SHA-256: d6ffacd7e4a560300189bc68b08c3247b987e76e4a65781a5fa971ed7c73def9
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/123?keyword=old+shockwave+games+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_5f946ff810b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f95d4d67f138.pdfIn PDF document text
    • https://fakanodadix.weebly.com/uploads/1/3/4/3/134371587/biwizifujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_5f93ecac31afb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_5f9a5421ee09f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_5f9a1f772addd.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/nujazu-ranubasomix-suxovuke-zezaxediseru.pdfIn PDF document text
    • https://riwominejakubik.weebly.com/uploads/1/3/4/5/134598273/zabotopo.pdfIn PDF document text
    • https://xikalevu.weebly.com/uploads/1/3/4/3/134319979/876504.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/dfa4433c-5eee-4238-96e9-5e6db3680e18/webafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3602a86-2efd-4b1e-8570-8ee69ee99c8f/suvevemefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7cd970-fb52-466e-be2a-306f768f6245/dna_rna_protein_synthesis_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8005176c-c794-4468-a5fb-e89f48623e52/67637210244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ade817-5b6f-4621-8539-2156bc06daf8/34195516126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d5324b-560b-4ae7-b000-b86302ccb9ef/advanced_accounting_11th_edition_chapter_1_solutions.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_off00006ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF0 5392 bytes
SHA-256: f7737412f56102203a3a8f5605c55b96bb04ec4ebc38ba91045dc452d861c0d4
font_01_sfnt_off00008236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 10776 bytes
SHA-256: 95f90ed0e4c707e2df3b2255cbde0d1a92840d486c3cf8c15cdb572931fb6fe7
font_02_sfnt_off0000a710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA710 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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