Malicious PDF — malware analysis report

Static analysis result for SHA-256 b179866384f2c293…

MALICIOUS

PDF

34.0 KB Created: 2020-08-25 11:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1bda916b90b4f0cfc740f950d94b65d4 SHA-1: 5da316a928ae29445597e23c9d7fe7b2c1e8599e SHA-256: b179866384f2c293f173af259c24837a3814c2d7510b8d89f39ef1fa7b8ddc4d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This indicates a link farm strategy designed to obscure the ultimate destination and potentially engage in SEO poisoning or phishing. 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.ru/pify?keyword=choose+the+correct+answer+modern+science In PDF document text
    • http://files.testsiteforhsct.info/uploads/1/3/1/6/131637014/8d27884c3.pdfIn PDF document text
    • http://files.legacysportsusa.com/uploads/1/3/1/3/131379828/1649e0a57082.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/1/0431/5591/4918/files/fases_da_anestesia_geral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/roveserurusinazaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/2591/5045/files/yeah_sure_why_not_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/jeguki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5770/files/kudov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/vinimadozelidesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/vugatopuduvaxezozokixopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gimuwuwizarisatin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3343/4011/files/learning_style_visual_auditory_kinesthetic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1775/6057/files/christmas_card_template_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/xusovufif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/caballo_de_troya_jj_benitez_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/sucesion_ab_intestato_derecho_romano.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 4

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_off00004888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4888 5144 bytes
SHA-256: 07852c5d9b0a60073a2b8ee915504695f75d3972829de69c02afa3eb42b67467
font_01_sfnt_off000059e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E1 9668 bytes
SHA-256: 326dae2311d8a5bcbcf69ed162cbd35b314f45320bc46f05ba1587855e1d0374

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