Malicious PDF — malware analysis report

Static analysis result for SHA-256 18658ee90f0549a8…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 23:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7fc4c3e3a486cc54cd651f0cdeacd016 SHA-1: 17f9e4ac5e91dfcf3bc4190a0b7db3f5ee2dcab4 SHA-256: 18658ee90f0549a86beb56a625842ca107cdb0f0c244f981760753082cae33ee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) and a large number of PDFs hosted on Shopify. The ML classifier strongly indicated maliciousness. The primary attack pattern involves luring users to click on these links, which likely leads to malicious content or phishing pages.

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=free+family+feud+template+google+slides In PDF document text
    • http://files.scwineryreview.com/uploads/1/3/1/6/131606198/bakexowi-xawope-nedowividiruliz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/24883746721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2476/7383/files/broiler_chicken_diseases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4172/6370/files/ninuzemikuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/convert_to_word_acrobat_xi_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/74084087104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/61735831279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/tv_guide_louisville_ky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8051/4726/files/libros_para_colorear_de_paw_patrol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/muvowelefomadolazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5418/9983/files/timejavekawiworeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/searching_and_sorting_algorithms_in_c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5961 5196 bytes
SHA-256: 40bfe440079ec7b27a539a0dd8a754b114ad49062b9e3ed5ed234ad1bfe42a14
font_01_sfnt_off00006b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 9372 bytes
SHA-256: a54f13d9b2707b7ad0c96c20282ba7c28cf76d9b2c2d3d46a7a5c3f4bc4fe5c0
font_02_sfnt_off00008b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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