Malicious PDF — malware analysis report

Static analysis result for SHA-256 beebeff37a87d099…

MALICIOUS

PDF

49.2 KB Created: 2020-11-03 00:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9f7895cc276cb484b4d49245d20d4946 SHA-1: 8069b604fb283831916526c76cc8ef47b7989b92 SHA-256: beebeff37a87d09932a07c0c98a5eeb20785163955649ce76572bf1b0b97ce31
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://cctraff.ru/strik?keyword=school+calendar+2019+2020+nyc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5f90cc0e288fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_5f90119772b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f8c9d1779ca5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/london_william_blake_literary_devices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1496/files/colouring_pages_mandala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2227/5992/files/zokefuxanorewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/56846319856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0111/7344/files/nemudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3965/2516/files/60178837160.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/mevusixixuruf.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/87078595411.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/momiwajabenixizekawosafo.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/skyui_special_edition_vortex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2751/8363/files/9311845382.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA8 5536 bytes
SHA-256: 7b0b6c9d263130dcd189470aaae9550a9aba135cb8a9e13bfe52add44572246c
font_01_sfnt_off0000927e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927E 11024 bytes
SHA-256: d7e6a6fe796e808cf66e3ee4aa8fe228f4f8169ecdceacd1924628d6d3ced93a