Malicious PDF — malware analysis report

Static analysis result for SHA-256 25bb6216aad631c6…

MALICIOUS

PDF

49.6 KB Created: 2020-08-19 00:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c486089d6310f6e8451f1ad79a681e03 SHA-1: 93c67ef1da41bebe6c084e8126ee21c28ea7ae74 SHA-256: 25bb6216aad631c66563a608d940e1e01c12de856e8fa2c34e249e6ea8cd9231
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a link to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Australia calendar 2019 pdf' and a URL that matches the redirector found in the heuristics. This suggests the PDF is designed to trick users into clicking the link, which then redirects them to malicious infrastructure.

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=australia+calendar+2019+pdf In PDF document text
    • http://puzoxi.r2cell.com/uploads/1/3/0/7/130738909/6654176.pdfIn PDF document text
    • http://regavif.aston-financial.co.uk/uploads/1/3/1/4/131453870/zezizukarod.pdfIn PDF document text
    • http://files.rmscnc.com/uploads/1/3/1/4/131453432/konozifiwuwugok.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/1/0435/5063/8241/files/kojidajej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/geometry_5._8_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/black_metal_logos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4952/4127/files/franchising_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/kovipokipunobamemibudula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6983/2342/files/optics_hecht.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4090/5128/files/ways_to_reduce_absenteeism_in_the_workplace.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/30_beats_full_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/4628/3937/files/bilirrubina_directa_alta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/furosemide_davis_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/conjunction_english_grammar.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000622e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 5620 bytes
SHA-256: 837593b3f840389cf8f17220e260572acd031769ddd24bc51cccc5208c7fe9fd
font_01_sfnt_off0000754f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 15024 bytes
SHA-256: 220756ad745eff4620b8a1f2d283a389a9d8b977a3927faf5a0a7c5b6435f60e
font_02_sfnt_off0000a495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA495 16108 bytes
SHA-256: aed46c9af23f208f135cb03afacfd1ac790ba89857c5134c11dc43e7260cc7d5

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