Malicious PDF — malware analysis report

Static analysis result for SHA-256 4323a1b1f4a8e6e0…

MALICIOUS

PDF

42.5 KB Created: 2020-08-09 19:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c8ea652c58c6aad4937afdcc54ce5e3 SHA-1: ace8d3a3c2abaf80a8bd2f6d71b0a0b9de65267d SHA-256: 4323a1b1f4a8e6e0d504458cfb379b106f2a498255b08939fbb68ada3bff917c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link that points to a known malicious domain, disguised as a medical certificate download. The ML classifier strongly indicated maliciousness. The document body and embedded URLs confirm the lure to click on the malicious link, which is designed to lead users to a harmful site.

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=medical+certificate+pdf+download In PDF document text
    • http://files.olypeaks.com/uploads/1/3/1/4/131407194/949849.pdfIn PDF document text
    • http://files.victoriazamora.net/uploads/1/3/0/8/130874252/tasofopapofa.pdfIn PDF document text
    • http://metulev.providencebaptistchurch.org.uk/uploads/1/3/2/7/132740405/siranuwuw.pdfIn PDF document text
    • http://files.mrsdawson-classroom.com/uploads/1/3/1/3/131380213/82ad8784c19aade.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/1/0432/6011/7160/files/valez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5892/0610/files/bible_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/paluligebirasafuvakirito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7968/7587/files/def_jam_fight_for_ny_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/netugon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/75861499479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/bimakemosolufagonafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/97364787481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/mancosa_assignment_cover_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/d_d_5e_dwarf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/definition_of_social_media.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/49596494860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4885/2894/files/alkyl_halide_mcq.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 5

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_off000065ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EC 5068 bytes
SHA-256: d48d8c951516cf3a34c6196c65eb749a6e6b2f081f056530877a178140fdebe2
font_01_sfnt_off00007757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 10996 bytes
SHA-256: 5ebb6aa4c971bd54282a76ec955afa6744f43a0377f158f2e8fd311c9829afdd

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