Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbee47e33206512…

MALICIOUS

PDF

43.6 KB Created: 2020-08-21 08:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eeeabacc45192367add95263ce2b585a SHA-1: eb3e52efa48d678fd115c52ebe22f9bd55429bea SHA-256: cdbee47e33206512424fa9b04e1ab3d3d52f1f0839a3757f48d970598458611c
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains text related to 'calculus handwritten notes pdf' and includes the malicious redirector URL. This suggests a social engineering lure to trick users into downloading potentially malicious content.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=calculus+handwritten+notes+pdf In PDF document text
    • http://files.certosadipadula.org/uploads/1/3/2/7/132710621/5737571.pdfIn PDF document text
    • http://tasugos.jakesmeester.com/uploads/1/3/0/9/130968996/29691d85dc65.pdfIn PDF document text
    • http://files.danburyneighbourhoodplan.com/uploads/1/3/1/6/131607522/fivujamomuvaxesiwik.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/1/0431/6574/5314/files/book_of_thoth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/45425869280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/bonos_de_carbono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/remove_malicious_code_from.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/mumejudedarisasexaxojax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/suboxaxogune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/48686882240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/vatavetiwavenin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/39829396984.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 1

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_off00005fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 5240 bytes
SHA-256: ac621061e8b3a35fa00902e72719708fb380ad9d44e586b018d19fd2daa9917b
font_01_sfnt_off000071b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 15656 bytes
SHA-256: 05efdaa98824eeb018b7885a56b2df1b43edbdd8320adb702e5af9fe2a6aa1ec

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