Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b681d206b39c1b8…

MALICIOUS

PDF

57.6 KB Created: 2020-08-12 17:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8e108567e5d1016feda7b283d2850fa SHA-1: 2d299e2801a8201e7e8ae9e60ae7274dc2b94a0c SHA-256: 5b681d206b39c1b809fdeb39d40d2d3949f24546a00d9daa564e14e00d019e80
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on domains associated with SEO link farms and redirectors. The primary redirector URL, 'https://ttraff.ru/pify?keyword=caries+dental+diagnostico+pdf', is flagged as malicious. This indicates the document is designed to lead users to malicious websites, likely for phishing or malware distribution, under the guise of providing a dental diagnostic PDF.

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.ru/pify?keyword=caries+dental+diagnostico+pdf In PDF document text
    • http://files.ifeomaanyaeji.com/uploads/1/3/1/3/131383860/7178452.pdfIn PDF document text
    • http://files.smugshots.co.za/uploads/1/3/0/9/130969772/sabasitex_taveginexowupun_bijemaruw_xireguviwesupo.pdfIn PDF document text
    • http://files.mygasz.com/uploads/1/3/1/8/131856353/norisafuga.pdfIn PDF document text
    • http://dewepora.lakeside-kennel.com/uploads/1/3/2/6/132696434/8874462.pdfIn PDF document text
    • http://files.thebeaverracing.com/uploads/1/3/0/7/130776164/614965.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/1/0433/0687/7080/files/20807514836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/pipinalodavenegadufeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/10935311437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88020392138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/18755468210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/mamabijusoxojaxoxekup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/descargar_libro_caballo_de_troya_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/sujid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/47759235441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/science_10_textbook_alberta_addison_wesley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/zebajavapofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/65276582505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/11455327287.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F28 5228 bytes
SHA-256: bb83627cd20bf31711fcb0654c470005b54712073d22510df10ff05803236f66
font_01_sfnt_off0000a103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA103 10208 bytes
SHA-256: 3bece9210baa563dfc9331d8a29b5d4a96563f64264173f38723876924ae95a3
font_02_sfnt_off0000c3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F5 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15