Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc16bb31338bbccb…

MALICIOUS

PDF

40.3 KB Created: 2020-08-11 12:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2020a39499962802f23bdb0aba884c5 SHA-1: 50baadfc029840d64a870425debfc4fdd864c19b SHA-256: bc16bb31338bbccbee87b6d853f02cf751b5af30a9ac31b69a80ec66b38f609a
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body contains garbled text but also includes the URL 'https://ttraff.com/pify?keyword=ecological+niche+pdf', suggesting a lure related to ecological niches. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a potential SEO manipulation or link farm tactic to distribute malicious content or traffic.

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=ecological+niche+pdf In PDF document text
    • http://buzexedux.mphopkinsstudio.com/uploads/1/3/2/6/132682883/504db3dc759.pdfIn PDF document text
    • http://lalag.tomsolaribuilder.com/uploads/1/3/1/3/131383483/xabomogozo.pdfIn PDF document text
    • http://files.bar2nranch.com/uploads/1/3/0/7/130775242/vipebaluxiwo.pdfIn PDF document text
    • http://files.naturalicatchirhythms.co.uk/uploads/1/3/1/8/131856414/koxogivar.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/1/0436/3314/8062/files/b_j_thomas_advanced_vocabulary_and_idiom_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/28469100206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7803/3303/files/dokibizujobudokikiriz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/resume_format_for_applying_job.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/atherosclerosis_slideshare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/vidibaligofilenaxur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/wujutasusozamidowatela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/venoxawawetat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2919/1066/files/deforestation_and_global_warming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/29817088495.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 3

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_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 5100 bytes
SHA-256: 3e6617779f9cc4c55e6335f135318281cd31d33679d8ac4003cddce721484fea
font_01_sfnt_off000072d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 10124 bytes
SHA-256: 92f3b336ec86fd3139e57f0fa024e8dd9ef355bedd5622b203c9a17cba07d799

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