Malicious PDF — malware analysis report

Static analysis result for SHA-256 63728c95d957dad1…

MALICIOUS

PDF

42.9 KB Created: 2020-08-06 19:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3407d9294335056cbcd878043d2bf2b5 SHA-1: 7012a2fac83ad68b340aacdf17c991139547c55b SHA-256: 63728c95d957dad10bb26723eb765c8e3a70dab8f459577fa08e18bb09c29014
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to an SEO redirector, which in turn points to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=capsular+staining+pdf', indicating a phishing lure for what appears to be a document related to 'capsular staining'. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=capsular+staining+pdf In PDF document text
    • http://files.katetenenhouse.com/uploads/1/3/1/4/131454883/1395416.pdfIn PDF document text
    • http://files.jackfew.com/uploads/1/3/0/7/130738870/ff3896.pdfIn PDF document text
    • http://files.kcbakes.com/uploads/1/3/0/8/130813528/gatujadutani-dorodexafikun.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/1/0441/2165/3400/files/49345746731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/42674331818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/jegapipamekan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/67031742889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/24068063056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/discrete-_time_signal_processing_third_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/cinderella_solution_quick_start.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/doresazoxuguratisajatij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/ibps_exam_calendar_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7230/6852/files/62173034400.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 3

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_off00006aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 5112 bytes
SHA-256: fcd465953a149fb5c63deff913c003a32dfbcce5461fa26a66c6f0026ecd6d6e
font_01_sfnt_off00007c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0F 10256 bytes
SHA-256: 2755d7026d227b07e49c9b62faf4472d0c8a7267d6ab942ed8c0f21076389773

Open this report in the interactive analyzer, or submit your own file for analysis.