Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f686ec5aa66d54…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 03:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ebaa97dca288941b76fbff0523f36ad SHA-1: 042d482420681dafacf6f1331cd6ce8ed240f930 SHA-256: b6f686ec5aa66d5484a15a7880e7133324be0c57aeba4364c736513108d1cd1a
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to drawing tutorials and the authoring application, suggesting a lure. The primary malicious URL is 'https://ttraff.cc/pify?keyword=aprender+a+dibujar+rostros+paso+a+paso+pdf', which is likely used to redirect users to a malicious site. The presence of numerous external links, including to Shopify domains, indicates a link farm strategy, potentially for SEO poisoning or distributing further malicious content.

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.cc/pify?keyword=aprender+a+dibujar+rostros+paso+a+paso+pdf In PDF document text
    • http://files.tideriders.com/uploads/1/3/1/3/131398477/357720.pdfIn PDF document text
    • http://nipuzux.cashmereboutiquespa.com/uploads/1/3/1/3/131398560/runev.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/1/0432/2567/7982/files/antihistaminicos_primera_generacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/veneridened.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/47341440633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/ecological_development_theory.pdfIn PDF document text
    • http://files.dofuspourlesnoobs.com/uploads/1/3/2/3/132303061/dumepisimo_wowanolemupi_jijug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7469/8912/files/31379350496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/magasuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/xiwavigusub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/kapaxobipudewipitirekidaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/16504299603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/buwoligasomasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/95342646812.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F36 5208 bytes
SHA-256: b9eb5c9e41cc14eab152924311df3c92722f77d14651c41df5a022ca68c185bf
font_01_sfnt_off000080f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F6 10464 bytes
SHA-256: 3382e3415388bb8a9ed9f81a8340f5d78cb9dea89a9278090ae7fd5865c4fcbe

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