Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a680b1544c6366…

MALICIOUS

PDF

46.5 KB Created: 2020-11-02 03:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d4bdb92db22c0fb0b530d67efdfe729a SHA-1: 8cab1199675fa9901874b8a5f15124dcd11d9115 SHA-256: 66a680b1544c63666791d0fe7e371c15bf8169fb578778a5d0e8970efcf51391
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=la+fitness+newington+ct+class+schedule In PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/vupuxa.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/bilozosagadawetero.pdfIn PDF document text
    • https://zifujotali.weebly.com/uploads/1/3/4/3/134310407/xajepiw.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/gitetomuvi_toleko_gerusiletufal_lineredigawutog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450638/normal_5f9f3ce1bd216.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://cdn.shopify.com/s/files/1/0500/5973/9306/files/possesive_noun_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/lejezulepanitezagoves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7935/8365/files/math_formula_sheet_ged.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/tci_lesson_11_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6258/2180/files/animal_cell_organelles_labeled.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_off00006879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 5104 bytes
SHA-256: 7f6a72a191de49439ad19940ff18bd4c679040ea52d9785fe5d53ccae1ca740a
font_01_sfnt_off000079e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E0 11096 bytes
SHA-256: 930ca77ba5dc194585344d0ee8b73188aa00969b3dbb0f26aa1564321e3b36c2
font_02_sfnt_off00009f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c