Malicious PDF — malware analysis report

Static analysis result for SHA-256 84126bc2e051bd7a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-15 16:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15b7990470c27bd211208dab9a8e687c SHA-1: a862804da234fb8f4b69393ebe5074cef91bfc74 SHA-256: 84126bc2e051bd7abb6827d39ff1435f34eab14fd41afe0d6586884f56740de4
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to redirect users to a malicious URL, disguised as free architecture portfolio samples. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate this malicious intent. While no scripts were explicitly extracted, the structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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
  • 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.ru/pify?keyword=architecture+portfolio+samples+free In PDF document text
    • http://files.colourdance.net/uploads/1/3/1/3/131398125/movus.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/1/0431/6138/7170/files/buvotusisewelikobegofug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/jazezubowojuzixuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/atrahasis_italiano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7290/3585/files/38424669543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5199/1719/files/75540141447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/verenexopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4995/8046/files/97313191925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/nuzomuv.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 1

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_off00006d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5D 5244 bytes
SHA-256: 6b3ebae0a9a801e2c3ff6aff0c7ed515be2e0b5a16169c01f82fc7be959a669b
font_01_sfnt_off00007f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F08 9712 bytes
SHA-256: 744dc39f31c6585e8f363fd05be7c4d2061476a8ab1a1ec39d3fb678779aa737

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