Malicious PDF — malware analysis report

Static analysis result for SHA-256 36693e443012d690…

MALICIOUS

PDF

41.9 KB Created: 2020-08-24 08:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cdc8da745210613b86e58ce52777b29f SHA-1: ddb62f9f48764aae738b72599ed39dae2618f51e SHA-256: 36693e443012d6904aa2e2799e5ff9e063e3ff688fb14654028eb90b9bb869e0
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, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=caia+level+1+book+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Caia level 1 book pdf', suggesting a lure to download or access content related to this book. The ML classifier strongly flagged this PDF as malicious.

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=caia+level+1+book+pdf In PDF document text
    • http://files.workofheartfacepainting.com/uploads/1/3/0/9/130969652/xokoguxore-kofut.pdfIn PDF document text
    • http://files.vintageannalsarchive.com/uploads/1/3/1/4/131454850/9bb331.pdfIn PDF document text
    • http://kemumimi.mathtvcourses.com/uploads/1/3/1/3/131384169/toresotibako.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/1/0432/8911/6836/files/88707000128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/91592988437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3935/9127/files/63820776917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/vocabulaire_anglais_financier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/77842456423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3209/8469/files/wavelet_transform_time_series_forecasting_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/16440759093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/49674040878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9543/6955/files/assertion_and_reasoning_questions_physics_class_10.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 2

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_off000066f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F2 4984 bytes
SHA-256: 281a36c81c83c3ec7579d48fec81828fdce87ef560591afbc681415a5d24f3ec
font_01_sfnt_off000077fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FD 10376 bytes
SHA-256: 3abd82525497d9147f078c65087dda1dbd6a3f962f2359cdabac13c88a63a66e

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