Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbdf94165ebe499…

MALICIOUS

PDF

45.8 KB Created: 2020-08-21 23:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ed3078eaf9b2bcc69071617c25cfc20a SHA-1: 68d6a90da18e08d341b9ed7cac19a0b73b6f657a SHA-256: 4fbdf94165ebe499d0bd8aa43f81abb6a9935efa54938e6c660b35882c5ae51c
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.com/pify?keyword=celebration+of+life+service+program+template In PDF document text
    • http://bokigaxif.jewersdoors.co.uk/uploads/1/3/1/3/131379732/5ffa80ab3b38c.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/1/0433/4845/9673/files/kudiredifutususuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/wedefiporufesejizefelosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/69672434856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2529/3724/files/61096224441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/jaxewajitiwuwes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/tipos_de_plantas_carnivoras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4683/8176/files/34093796286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/8524278625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/konajegopopamepumuzalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/73734302005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3293/9418/files/core_java_concepts_for_selenium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6784/1443/files/zagefobixotogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/dolenoronakotisi.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_off000066eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EB 5344 bytes
SHA-256: 6e9d9fdcf9faa33cfb6f1e9febc3e1417b786c32c7bbea3a71f19a57fb01e05d
font_01_sfnt_off000078ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78FF 10228 bytes
SHA-256: 3bf786c48debac888e53aa9654d7e910f0322fe65613bc65a133323f456972bc
font_02_sfnt_off00009be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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