Malicious PDF — malware analysis report

Heuristics 6

• 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.
• PHP webshell / backdoor source high WEBSHELL_PHP
  The file contains PHP server-side code with the signature of a webshell/backdoor (request input fed to a command/code-exec sink). A webshell takes attacker input from an HTTP request and runs commands/code on the server. Flagged as a malicious hacktool artifact even when carried inside a document or archive — the code does not execute from the carrier, but the file is a webshell.
• 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=ark+survival+evolved+mobile+apk+aptoide In PDF document text

  • http://nefupumo.smile2340.com/uploads/1/3/0/8/130874493/pedede_rugolufeda_noxirivanusaf_tavika.pdfIn PDF document text
  • http://vifizu.jonascain.net/uploads/1/3/1/3/131379866/pulezunikulu.pdfIn PDF document text
  • http://dufuloben.scarboroughukes.com/uploads/1/3/0/8/130874380/5085397.pdfIn PDF document text
  • http://fosojaza.yasminevintage.com/uploads/1/3/1/4/131452883/958762076bd29cc.pdfIn PDF document text
  • http://serepipe.jlgpublishing.co.uk/uploads/1/3/2/6/132680813/4775040.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/1/0431/9058/3464/files/http_filesify._com_wr6jfm_password._txt.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0451/0013/8661/files/analytical_chemistry_principles_and_techniques.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/85463632144.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/suxirixezaginebob.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/fun_brochures_templates.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/91961405792.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/67934260962.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/vizipinexajov.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
  • http://dejavu.sourceforge.netIn PDF document text
  • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

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