Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bb8d2ffaf4347f…

MALICIOUS

PDF

46.6 KB Created: 2020-10-09 19:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: a80a020a1c66174ef9ed372c05a34a6c SHA-1: 5c7f0fd5421871c78f6f64dd94ff82f7801f5ad9 SHA-256: 72bb8d2ffaf4347ff94be67bf90c48ef46f8438052249edb76ededa7a1692bf2
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=cellular+respiration+worksheet+answer+key+pdf In PDF document text
    • https://site-1038416.mozfiles.com/files/1038416/wizadesid.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/sosubunatewujumipewu.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/34465765748.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/74779260273.pdfIn PDF document text
    • https://site-1043978.mozfiles.com/files/1043978/titedumage.pdfIn PDF document text
    • https://site-1039346.mozfiles.com/files/1039346/lazusowokubivelef.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/fopesikisegijuradadix.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/1/0434/0632/7975/files/the_blue_danube_waltz_in_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/pupij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4634/1270/files/27228063805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/nikon_prostaff_scope_adjustment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/red_riding_hood_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9029/4437/files/gofugoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0834/6270/files/28419615552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7557/files/mother_natures_son_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6604/2784/files/what_was_the_main_advantage_and_disadvantage_of_buying_on_credit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 5292 bytes
SHA-256: 1a7d4edb0b2401bebc12695c2d9e2418c3c90c4da904cdf3ac5f87eed07d4d7b
font_01_sfnt_off00007b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0A 10388 bytes
SHA-256: 769458bc6ce479ec83131a6f3d2a770fdb2530d4c187ea314b8392eb2b1e0f9e
font_02_sfnt_off00009e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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