Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8265750c54ca41d…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 00:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab34f7571f2cd7cefcc7395d48110296 SHA-1: 51884dfb4a114ad0393fed7c26e1c693aeb61255 SHA-256: d8265750c54ca41d819eb06914cd85f47a1981b5993682d82e4f63b5d734aef0
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body text, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the document's primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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=mazda+3+android+auto+not+working In PDF document text
    • http://mejad.healingstreammedia.com/uploads/1/3/1/3/131398008/5860967.pdfIn PDF document text
    • http://zekonizu.monicanicolaides.com/uploads/1/3/1/8/131871864/5578889f2627.pdfIn PDF document text
    • http://files.missioneventrentals.com/uploads/1/3/2/7/132740564/4578599.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/1/0432/6440/9764/files/3990482104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/soxetujogomisurol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/5261083887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8545/3728/files/hana_database_development_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/76237678816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/82710261094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/781006232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/vofekewiredekowozarufag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/russian_roulette_rihanna_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/5809764476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/principles_of_managerial_finance_6th_edition.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 3

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_off00005efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFE 5160 bytes
SHA-256: 9c192b6c0a0d379950d5027b89d3a6a22918bc28a4cc73e9af91a911ac9d2e20
font_01_sfnt_off000070c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C1 10060 bytes
SHA-256: 1c1d1f91ffa7991e26e87ac8d3e416180bed57f1c3092d270513ee31da0d6df1

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