Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5a94a4db4f3569…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 00:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 598c14a28b56fb04a207825f170e0616 SHA-1: 0590ec3f75cb053be67e4abe849bf8f9e0d443df SHA-256: 8d5a94a4db4f35694e10166053c1b70b742584fa3e7d924ccdb156cde0656091
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the same URL that leads to a known malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content.

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=encyclopedic+dictionary+of+exploration+geophysics+pdf In PDF document text
    • http://files.lovingavonlea.com/uploads/1/3/0/7/130738662/letituvabil.pdfIn PDF document text
    • http://files.calvarycrossville.com/uploads/1/3/1/3/131398360/zekaduxoro.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/1/0428/8937/9993/files/nabh_accreditation_standards_for_hospitals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6591/5045/files/annuity_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/estimating_square_root_worksheet_8th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/posotobozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/cast_bronze_bearing_design_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6791/1842/files/conjunctions_list_english_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/dezelobatanoxodute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/waxewimufimalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/70516553700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3876/8284/files/convert_to_word_free_download_cnet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/24060527618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/allergic_rhinitis_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2913/4487/files/vesigojipevegaf.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_off00005db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB4 5544 bytes
SHA-256: 740f001f718cf4828b6b46b15d2ccf37d5ecf973ae636bbf63bab559bf48d13e
font_01_sfnt_off00007091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7091 10316 bytes
SHA-256: 022ab81b814b32273d2c55dbb481c33503a7e7d13a5bd36124c254379826dcfb

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