Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b8646701cb658f…

MALICIOUS

PDF

36.3 KB Created: 2020-08-19 00:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 896e6c0d32c7608e982a39f198517223 SHA-1: 47117af13f9740d94f6c04e10cf366321c07110f SHA-256: 25b8646701cb658ff9efc30b6c31cf36db862d72239ba9967e14c15043b6e95f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine results or distribute malicious content. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure. The document body itself is heavily obfuscated but contains a URL that appears to be the primary lure.

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=erc+cpr+guidelines+2018 In PDF document text
    • http://files.franciafonseca.com/uploads/1/3/1/4/131406736/1f20ae0893960.pdfIn PDF document text
    • http://files.mathkanection.com/uploads/1/3/2/8/132815123/4e1a44b281b.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/1/0435/0207/6070/files/create_github_repository_from_command_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6942/files/61756034653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/xafekumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3195/2536/files/4050306888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/wixoxomozomozebopukororu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/install_boost_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/69278854289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5522/files/autocad_2016_installer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/english_grammar_tenses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/electronic_bridal_shower_invitation_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/vawudofuratabigivimax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/mojezesuzoxegofugaxuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/vexigijozilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/tratamento_cancer_de_colo_uterino.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_off00004fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC3 5508 bytes
SHA-256: 5268855e013de59f63d64e382ae8082651a50cfbbfc5329f6cc157ec845c495e
font_01_sfnt_off00006295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6295 9928 bytes
SHA-256: ebaff8e6756d5c4a901716bb06102dad39fe92a3abf59cfa57d7a583679d8a30

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