Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd52efe47a8a674…

MALICIOUS

PDF

41.9 KB Created: 2020-07-28 21:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4237acbc7f3fa08885cd6e7855fee4e4 SHA-1: e4695134176195813bcc0ffbfe769ecec735e5f4 SHA-256: 6cd52efe47a8a674ff534017899c6bbcc360eb9993661de01c343ad45c796773
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a malicious redirector, designed to lead users to external malicious sites. It includes a link farm and a specific redirector URL that is flagged as malicious. The document body, though heavily obfuscated, appears to be a lure related to educational content, suggesting a phishing or scam attempt.

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=gcf+word+problems+with+answers+4th+grade In PDF document text
    • http://files.hisandherhome.ca/uploads/1/3/0/8/130874680/4279873.pdfIn PDF document text
    • http://files.sheffieldmills.org/uploads/1/3/1/4/131438180/kabaxigaxufofowuxi.pdfIn PDF document text
    • http://files.pen-2-paper.co.uk/uploads/1/3/1/4/131438323/tunifu.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/1/0434/7058/6022/files/48621713321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/27355825059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/23345860696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/nides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/wirubijalanovex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/36498276007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/44235972563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1775/6062/files/sakarepovubofuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/jaziwop.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_off00006451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 5708 bytes
SHA-256: a9fcc8299ed05c594465bdea3c97b1ac7e5f2bb127d13b2307e56e8d871e1fed
font_01_sfnt_off000077ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 10292 bytes
SHA-256: da87627375794ed5ffa77ff677a5c067815a472ac4a25dd9ddc11c2bab4e609c

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