Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e37d886fbfa928e…

MALICIOUS

PDF

42.8 KB Created: 2020-09-30 03:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 88e211cb8b3734dae8b4574d15733dbc SHA-1: 8e2c72a72d7f2a9589a14589ad6379d6855ef6c9 SHA-256: 4e37d886fbfa928e418fdfbe33962219807a8e3c553e3791a47afcb46c1e11b4
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://ggtraff.ru/strik?keyword=multilingualism+in+the+philippines+pdf In PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/vesekitilebufexadumeguvit.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/5469478803.pdfIn PDF document text
    • https://site-1037282.mozfiles.com/files/1037282/73560858507.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/donuwirenagogi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b528a287-c6c0-4c1a-8274-39077df5d104/7968977844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32b2644-f869-45cc-bb30-78ac4f2443b8/katojudunukusuxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8fd17a-8557-4a9a-94b9-41d7a7ec0888/54318125548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/28524510467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6090/4604/files/25741461667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/canada_food_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/44046725074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/92562714298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/gikorabafufurufewuxun.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_off000067d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D1 5364 bytes
SHA-256: e7dd9b14ad36191f9a2b6f98025e7bd47cccef40b3f58ced2054f267810a0def
font_01_sfnt_off000079fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FE 10648 bytes
SHA-256: 781ae180f5d87533bbfb5c5edc49e5ac0caf311cadff44f14e69d2bca8f65c68