Malicious PDF — malware analysis report

Static analysis result for SHA-256 20688ee024fab4b1…

MALICIOUS

PDF

63.5 KB Created: 2020-11-02 18:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 89fbed0e9809a7686b51b65a411073ad SHA-1: de16175fc1da333b1e8e53cbe786884a21f8de8c SHA-256: 20688ee024fab4b111933486337912ca1d9ef7df3defc46022b66aa751e6cdd7
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=drax+quotes+from+guardians+of+the+galaxy+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f9703e5d9335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f8dfe90401fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5f953576a9e19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f9fdc4d8ab78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f9d26872beae.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://s3.amazonaws.com/fasanag/83690201817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8810e570-e892-4992-b5a9-0cebd53f3484/90838790424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4952/8727/files/jetitowazezigutovefulet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4677/1125/files/rebajorotebepef.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/isometric_view_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/natinodalojijotegivem.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_off0000aa77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA77 5632 bytes
SHA-256: 296c6750969f60cffef4e95fca08f514a97058b5a219c99c418d633b96d203a5
font_01_sfnt_off0000bd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7A 10944 bytes
SHA-256: 1fec066d0d008f9c64e58a6777e1c6a1b147e741f6c9e488291e31d7948a5001
font_02_sfnt_off0000e2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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