Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b9f9d2209c5962…

MALICIOUS

PDF

44.8 KB Created: 2020-10-31 14:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: aeb94692d9877d82b1983e6076263aa8 SHA-1: a9c8d4ec0b2e5624c522a03c6a5dbfd2a933fd43 SHA-256: 62b9f9d2209c5962c48302091bdaadf0d913a1cf05fc4e1ccf7bb624df80b42c
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=clear+background+check In PDF document text
    • https://dosedoduni.weebly.com/uploads/1/3/4/3/134347632/gitonaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_5f960f7b78d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f905216e4d95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5f88d81b32ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f8d8d8486535.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/levurux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f8a50e01ce12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8901360e6c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388426/normal_5f9202f565c32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f9923b0834a7.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/560653a7-e2b0-41f0-87c8-92c56ea5b068/dipitarovagisametiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e634af6-2528-423c-9a4f-0d1af53045e6/brian_tamanaha_hawaii.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_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 5004 bytes
SHA-256: 2206be089cbb41da787beee8acb347e86cc76daf1f1bff0eb748046d276f3dc4
font_01_sfnt_off000074d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 10612 bytes
SHA-256: f31006ac2efde7e0cbf1bb89420b3d383f7d824cbcef6f5613c378425d8d2f4e
font_02_sfnt_off000098ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98EA 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71