Malicious PDF — malware analysis report

Heuristics 8

• 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.
• Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
  Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
• Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
  Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
• 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.cc/pify?keyword=chromium+for+mac In PDF document text

  • http://files.theitalianbridge.com/uploads/1/3/1/3/131381677/ed613d59121452.pdfIn PDF document text
  • http://files.wallingfordmuseum.org.uk/uploads/1/3/1/0/131070481/7608978.pdfIn PDF document text
  • http://xemup.myfantasyfootballworld.com/uploads/1/3/0/9/130969204/juwapuzederun.pdfIn PDF document text
  • http://files.aidan.co.za/uploads/1/3/1/3/131383964/kifup.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/1/0432/5831/4912/files/dexuno.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/netoneneza.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/jeffrey_archer.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/git_http_proxy.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/74602694437.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0449/3488/9627/files/emotional_development_during_adolescence.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/pimevutelapunila.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/vuluxosin.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/zeravixok.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/92658873091.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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