Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3957db93fa6d3e…

MALICIOUS

PDF

36.2 KB Created: 2020-08-28 07:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6519cb0eb06599ff1188ddc087ce9fa SHA-1: 67b4dc4191a130aa3cf339e4080a25bf2e5cfc8b SHA-256: 7d3957db93fa6d3e320f82d71bffece3632634cc843bc99ecf2876009b3019dd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) disguised as a free download lure. This indicates a phishing or scam attempt to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this 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.com/pify?keyword=domain+driven+design+eric+evans+pdf+download In PDF document text
    • http://files.spiritofwalloon.com/uploads/1/3/1/4/131452903/5163078.pdfIn PDF document text
    • http://files.hillandstump.com/uploads/1/3/1/4/131410736/5362609.pdfIn PDF document text
    • http://files.tashtinkennel.com/uploads/1/3/1/3/131397996/tetiduxuban.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/1/0431/8615/9767/files/gatedajatekofazer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/wufikosibon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/garami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/porn_mags.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/94306674664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/xolujewosijirigekol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/zufavulam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/33543166676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/dakule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/ibps_clerk_exam_preparation_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/80069997138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0623/0434/files/wurimowugopozakofe.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_off00005161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5161 5628 bytes
SHA-256: 3944dcf4ed015ea9c1b77fd23b9555483079f719c5db12bea0cf7281ff66d01a
font_01_sfnt_off00006480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 9176 bytes
SHA-256: 809f155d9ba39169ab5a30ea28d45a143c32cc9ac64b92fccc8f3a0dc4667edf

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