Malicious PDF — malware analysis report

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.
• 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.ru/pify?keyword=kate+sullivan+elementary+school+supply+list In PDF document text

  • http://gitasa.caitlincannonphotography.com/uploads/1/3/1/8/131856435/67c60e.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/1/0434/4938/5126/files/58141504808.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/http_cabal-_luminous._com_s.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/lugokovabubilipiwitisa.pdfIn PDF document text
  • https://static.usrfiles.com/ugd/3f0e57_817f31fb9d6c4f85adeed3277c32734c.pdfIn PDF document text
  • https://static.usrfiles.com/ugd/d5d855_c34530a7a802402e8d69a10ea9d68445.pdfIn PDF document text
  • https://static.usrfiles.com/ugd/8a419d_6bcb9b2012754f518657640214bf1204.pdfIn PDF document text
  • https://static.usrfiles.com/ugd/72b0e7_92529b833f7946ff8753dc50d6e10664.pdfIn PDF document text
  • https://static.usrfiles.com/ugd/7a359d_105b266a645b466280c5742aaae92041.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

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