Malicious PDF — malware analysis report

Static analysis result for SHA-256 259d0c5101f2ffd1…

MALICIOUS

PDF

41.9 KB Created: 2020-08-13 13:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52665ff6595ba724af6f99eccfebee97 SHA-1: cea687bcaa5fd5b2aee206df69cad8f28b6079c4 SHA-256: 259d0c5101f2ffd1bfdd0101e6a971818642d4b09f8d7c2ebb6e748bc9b59d2d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.com/wb?keyword=pulmonary%20valve%20stenosis%20pdf. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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/wb?keyword=pulmonary%20valve%20stenosis%20pdf In PDF document text
    • http://files.cancercervicalvph.org/uploads/1/3/1/1/131163684/xonezif_garagufore.pdfIn PDF document text
    • http://files.askthecat.org/uploads/1/3/0/7/130775033/1088374.pdfIn PDF document text
    • http://files.happyhealthysimplywell.com/uploads/1/3/2/6/132682607/2251954.pdfIn PDF document text
    • http://files.daughterofthestarswellness.com/uploads/1/3/1/4/131438142/sowusutazerima_bolerul_juwadi_luruzeva.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/buxigol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/antennas_and_wave_propagation_fourth_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/nefoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/12318844495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0589/1992/files/chilton_manual_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/23761918561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/temigoxugodotumixogofiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/zalimojalut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/tobapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/xigavututomegutule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5453/0714/files/reguzusigimuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/71642614859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/rovoranuzewovuvogamup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2179/4460/files/lonizeramidif.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_off000065d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3 5352 bytes
SHA-256: a50b6757f65ba154b394a43d1bbcb2cf763b3c96b2b15047554d7094e8c16012
font_01_sfnt_off000077fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FB 10144 bytes
SHA-256: 51510a0791b07f02e5e8098f9a3cbaa48bdc3f2b9a8651da24b8e2a21bb2b26a

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