Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdbe227fd1dbf67…

MALICIOUS

PDF

38.6 KB Created: 2020-08-03 07:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16bdf7623c886cec6dbb21ac8a5bd5fc SHA-1: c3635c89d890d5a98435582bea07372dfeb2e197 SHA-256: 9cdbe227fd1dbf67d8c8fabeb6ef5c2ca5296311064b6a66d56a69e1b832767c
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that was identified as a malicious redirector, suggesting the document's primary purpose is to lure users to malicious content. No scripts were extracted from this sample.

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://ttraff.cc/pify?keyword=calculus+early+transcendentals+7th+edition+solutions In PDF document text
    • http://files.birchsage.com/uploads/1/3/0/7/130740213/4639043.pdfIn PDF document text
    • http://files.stevenmmillerphotography.com/uploads/1/3/1/4/131454466/97d2b47179c.pdfIn PDF document text
    • http://files.emilygillcrist.com/uploads/1/3/1/4/131406258/nukebukekizotiruk.pdfIn PDF document text
    • http://files.annimorris.co.nz/uploads/1/3/0/7/130775921/b3f643e3cd85.pdfIn PDF document text
    • http://files.inwiththeold.co/uploads/1/3/2/7/132740423/refavogoleki.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/1/0435/4090/6135/files/swgemu_village_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/98344581131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7220/9574/files/5553208867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/mofakitokunenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/nimozejare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1729/0406/files/40873591500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/28004987122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/minecraft_brick_recipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7024/2460/files/relax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/menisomikona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/giwozawizovunajatinilalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9484/3298/files/90165963435.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 8

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_off00004dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCA 5116 bytes
SHA-256: ea24082652d3c43e298977b43283eeb7b912d69e7f57cf4e9e7ee7938cff6ce4
font_01_sfnt_off00005f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2B 13720 bytes
SHA-256: cbec5125bafa785b0973675c6e4616179765ba49f10e8c62c9ff85a25c7a9083

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