Malicious PDF — malware analysis report

Static analysis result for SHA-256 b477ed226957c051…

MALICIOUS

PDF

52.4 KB Created: 2020-08-17 10:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d403715237dab28d3d578ee74a3cb287 SHA-1: bfe59bc6ede6b2349add2f31ee1d1a898d190e26 SHA-256: b477ed226957c05104bd83fed3fda6e827c09e531dba015c5f39686e3d6d0ea6
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL identified is https://ttraff.cc/pify?keyword=contaminacion+atmosferica+definicion+pdf, which likely serves as a gateway to further 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.cc/pify?keyword=contaminacion+atmosferica+definicion+pdf In PDF document text
    • http://files.solanocanyon.org/uploads/1/3/1/0/131070246/6552027.pdfIn PDF document text
    • http://files.juaj.nl/uploads/1/3/0/8/130873846/7174702.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/1/0430/4066/9849/files/tikelitibajilalotibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3941/4677/files/25692275274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5765/9560/files/42164519896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/hourly_weekly_calendar_template_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/58460184720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/95201879780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4406/8773/files/sevafiwimapilofov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/92264831443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/30734619863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9605/3662/files/psychrometric_chart_ashrae.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/84937106210.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_off00008ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE2 5172 bytes
SHA-256: 6f5861be376d7413d367c5b4dae2f747333a3934231b0baa6e6a3eb589e4547f
font_01_sfnt_off00009e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E58 11340 bytes
SHA-256: 3ab1af0f5f7cfacabaa60a3ad549bec2b8712debf9d3b45ee5e20e022a945224

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