Malicious PDF — malware analysis report

Static analysis result for SHA-256 6263255a33942afa…

MALICIOUS

PDF

50.2 KB Created: 2020-08-08 19:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4138fec18eb1d59a579f407e4a036cb1 SHA-1: cacbc81b2f3340435c56ecf0d46d5fdacb1e9fb4 SHA-256: 6263255a33942afa4dc1659436f07a077ede27fe0d5017874f3a69266c7ad949
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing to known malicious infrastructure. The embedded URL and the document body text, though partially corrupted, contain a URL that is flagged as a malicious redirector. This suggests the primary purpose is to redirect the user 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=ejemplo+de+papeles+de+trabajo+de+auditoria+financiera+pdf In PDF document text
    • http://files.spawawa.com/uploads/1/3/0/7/130775063/lakewubedowegalaj.pdfIn PDF document text
    • http://files.lynnettejessop.ca/uploads/1/3/1/4/131438150/rivow_jevivenix_sapevedazex_vaxig.pdfIn PDF document text
    • http://lisamod.catholicplacemats.com.au/uploads/1/3/1/3/131383949/4421917.pdfIn PDF document text
    • http://files.bemisnursery.com/uploads/1/3/0/8/130813841/6102928.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/1/0436/8039/9513/files/teduzujajidugaxomozitora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/talotorenupusazepoluguful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/nenotiraladuguluxivax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/vekisisabujaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/ximopixavenaxakuvifegezas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0952/1317/files/20269668898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/81734625108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7868/8663/files/55940785959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/acknowledgement_for_industrial_training_project_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/50789571467.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_off00007d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5C 5472 bytes
SHA-256: 123b7ff2a0deb75dcb33a568131c13f383ab37d47b56122b39c0259925482000
font_01_sfnt_off00008fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDF 13376 bytes
SHA-256: 2c0b453f940ed2d0fe285b967ea2b2c923931cd5bcb2acb725645d9120b6355f

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