Malicious PDF — malware analysis report

Static analysis result for SHA-256 028c51813b0e7715…

MALICIOUS

PDF

48.4 KB Created: 2020-08-24 14:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c073222f6ef2f9e298bc7b05dec3f55 SHA-1: 74aacb376ac0d3fab103c323bedccb1eaf828500 SHA-256: 028c51813b0e7715e91604b75bdc7c96af723286ee783f10274ce29bf3e854c8
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link disguised as a 'Fitbit band size guide', which is a common lure for phishing or malware distribution. The ML classifier strongly indicates maliciousness. The embedded URLs, particularly the redirector, are the primary indicators of malicious intent, likely leading to a phishing page or a second-stage payload.

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.com/pify?keyword=fitbit+band+size+guide In PDF document text
    • http://files.jacwellness.com/uploads/1/3/2/7/132741556/ba5fc.pdfIn PDF document text
    • http://files.gregoiremazars-folio.com/uploads/1/3/1/8/131856160/jorabizaxobu_xukokufesar_virunek_fudet.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/1/0430/0996/6239/files/vuvanukagemeniluxegeduxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/ripoxuzufetavemumawubali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/80451854340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/mazekefekuvekuteronu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/adjective_adverb_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4494/5571/files/kali_linux_tools_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/68987568317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/sejavibalafokabisimij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/can_can_t_with_adverbs_of_manner_exercises.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_off00007fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB4 5012 bytes
SHA-256: 5d66a69da3790e6e95e24fe18ff791a556df0fadd9746566aa34e4ff56979978
font_01_sfnt_off000090d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D3 10652 bytes
SHA-256: c51b04130cdd7fe435d17affd9e59396cd6b2e5ce3541d66280951e3b8f86dca

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