Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2b3d55e19fe403…

MALICIOUS

PDF

64.2 KB Created: 2020-12-20 05:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 55a375575c03d6a76d3b71c2baadd7bc SHA-1: d70d3185fae0dad86d91cebf1e4a426393e05e43 SHA-256: ca2b3d55e19fe403b8e17fefdd8562c62d287e7050e3a4503e6127f683c2c791
84 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic firing for a redirector link, specifically identified as an SEO redirector for free-download phishing. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is designed to lure users into clicking through to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?utm_term=ap+biology+teacher+websites PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423189/normal_5f9b43cc18460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_5f8c49d7afe78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/begijufadi/lazofusete.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/bullet_raja_ke_bhojpuri_gana.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/baal_veer_2_episode_1_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05826836-2f54-4d34-aca0-3938c17e3214/pukesetejivuwokegutojemo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51ce4d26ff1194f8f2d2c/t/5fc92d1cf2c87f35e8a3801f/1607019804837/sungwon_cho_wife.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/49393932872.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59ab6084698658e7e4eec/t/5fc89f54970db930d9c55ed1/1606983508734/67164048389.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/apocalypto_hollywood_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/sellers_library_upper_darby_hours.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD7 5516 bytes
SHA-256: 2b9dfd242de6e3c030a84465628e6bc1815c8c7f139376b9f6d7f7bb1ef65ac3
font_01_sfnt_off0000cea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA7 11020 bytes
SHA-256: 662b204bb5ff1a147147f7d8cb661c33712d9505c0dda2c8dffdad64b350b4d4

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