Malicious PDF — malware analysis report

Static analysis result for SHA-256 29359d2c588edf4b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 13:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d5c9c66d82e712634e4c2dc302ca8d0 SHA-1: 1479b75d4713f1462efb59756849ace097de70ee SHA-256: 29359d2c588edf4b9fd0cc90cfea89ebe914b5016b8ceedd252c01787b4f5e14
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to a critical heuristic firing for a redirector link. The document body contains numerous embedded URLs, with a significant portion pointing to a redirector service. This suggests the primary purpose is to direct users to malicious content or phishing sites, leveraging SEO techniques to appear legitimate. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.cc/pify?keyword=imagenes+para+colorear+en+ingles+pdf In PDF document text
    • http://files.privatecounsellingandmediation.com/uploads/1/3/0/9/130969184/cea1c53.pdfIn PDF document text
    • http://sefovuvu.screeninglearning.org/uploads/1/3/1/4/131483337/nufubeden-nokeraduzala-rezamubawaj.pdfIn PDF document text
    • http://muzoruva.jovalynne.com/uploads/1/3/1/3/131383483/kuzoxinegefurazovi.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/1/0438/1258/5634/files/gujarat_samachar_news_paper_today_bhavnagar_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/98438390577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5770/files/54884948560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/93130196929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/66019845773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2944/5273/files/caseinato_de_sodio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/cleartax_rent_receipt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8881/9864/files/kaizen_amlioration_continue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/mexiwevesagodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/zanemuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/lalapomak.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6024 5412 bytes
SHA-256: e8cad05c0f4ad39982eae883ee29d7fbc5628d0e71431431c51def23b7db4294
font_01_sfnt_off00007264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7264 10652 bytes
SHA-256: 98bb6c9b71fb6054f1143cf1235d8001c844d58f21062235460529feb65fd47c

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