Malicious PDF — malware analysis report

Static analysis result for SHA-256 51728f606f505db6…

MALICIOUS

PDF

43.5 KB Created: 2020-10-20 16:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ed38be236e4a813ef828f1777f33b97f SHA-1: ca29bea475e7143780e6a1d4e3da89df3e122a89 SHA-256: 51728f606f505db6b190514ac730b038e227a3555f5950cd9d728cacc208da03
184 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.
  • 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://ttraff.me/pify?keyword=%25D0%25BC%25D0%25B8%25D0%25BA%25D1%2580%25D0%25BE%25D0%25B1%25D0%25B8%25D0%25BE%25D0%25BB%25D0%25BE%25D0%25B3%25D0%25B8%25D1%258F+%25D0%25BF%25D1%258F%25D1%2582%25D0%25BA%25D0%25B8%25D0%25BD+%25D0%25BA%25D1%2580%25D0%25B8%25D0%25B2%25D0%25BE%25D1%2588%25D0%25B5%25D0%25B8%25D0%25BD+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+pdf In PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/geponafomi-nipas.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/1823597.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/sapepapifa-kemop-soravixaleju-rafemuson.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/1261948.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/954086dc.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/tibadotazamixixepe.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005488.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005488.bin)
    • https://cdn.shopify.com/s/files/1/0500/3499/9446/files/size_guide_for_bikes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6653/0213/files/19002852003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5642/5879/files/python_check_if_key_in_dictionary_case_insensitive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1875/4454/files/cardiology_textbook_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f9ce72-735b-4f71-af25-1f0e9136f61e/32595681767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368b32e0-65ce-447f-a76d-d3d02fc2d509/nudekiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c215a5c8-0ba3-464d-90a0-e1b2720bc680/komunakemiripef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67213ac3-a2f5-42b7-9155-3e896940c23e/9901250876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3f5bb9-8518-4290-99fe-67ac36bc55f9/sowuvuluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d159bc-11a5-478c-a44d-dee5602b4d6b/44513525592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6453c465-3079-410e-892d-146274b1f2cc/momafuluvipifinuguji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47e2414-7e77-422c-9615-c156a616ea81/21499615394.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_off00005488.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5488 6292 bytes
SHA-256: 1e24a487468ba3c0ac05006109d9325f6667468378bece094ef2e529135e18a8
font_01_sfnt_off00006917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 17104 bytes
SHA-256: 2c07240dfb7c02041a04c05685d305aa72fd0fa004ebf016b28bd3b1455f707c