Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8e243879a82d43…

MALICIOUS

PDF

44.5 KB Created: 2020-10-04 04:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-07
MD5: 5fc4643baafd847f3d5715076632fe06 SHA-1: 98ff0a3a7258308fcb3e7ed8db4fcdb34cb76692 SHA-256: aa8e243879a82d433fba9d5eddd899271ede82caa1270d6bb155b71d48a0bf09
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=applied+logistic+regression+hosmer+lemeshow+pdf In PDF document text
    • http://musom.starrynightglp.com/uploads/1/3/1/3/131381078/banabupagi.pdfIn PDF document text
    • http://vufewuf.worthvillepreservationgroup.com/uploads/1/3/0/7/130775918/xuzajebud-kixavigek-posogewop.pdfIn PDF document text
    • http://xupadide.carpenterladycrafts.com/uploads/1/3/1/4/131438437/runalaguripabes_ludakofedokosov_diditu.pdfIn PDF document text
    • http://tuduvofis.littlebundleandco.com/uploads/1/3/1/4/131482952/9840310.pdfIn PDF document text
    • https://site-1036737.mozfiles.com/files/1036737/posaxexuwigeveve.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/fafalaxivukitevelatob.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/72536749444.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/wanuroregabomopurul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4139/0492/files/ravarewirigojuzetipewes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0541/1481/files/sun_layers_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/sopijoviri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6720/3733/files/minecraft.jar_download_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5645/9676/files/37833261608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/getjar_apk_safe.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_off00006f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F46 5440 bytes
SHA-256: c9887670bbfe73bfb5f365b2e2bf2b7ee7550c8180c73938e3e4d6059e4f82c0
font_01_sfnt_off000081ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BA 10308 bytes
SHA-256: 1f8f5cc7291f972743681130dcc48fe92adfc759981ca42a71aaba858dafe8e8

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