Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e659e0b2b350f3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-03 20:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0636e609c9a4b01337a6ca53c7da72e9 SHA-1: 68ff876875889ac190b0b66ef5814aff3c300647 SHA-256: 35e659e0b2b350f3747f191ebb0244c7a878e85dbe642628052b9ecffda0b63b
194 Risk Score

Malware Insights

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

The PDF document exhibits malicious behavior through a large number of embedded links, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The primary malicious URL identified is https://ttraff.com/pify?keyword=curso+robotica+pdf, which likely serves as a redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the same malicious URL and a large number of Shopify-hosted PDF links, suggesting a link farm or redirection strategy.

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=curso+robotica+pdf In PDF document text
    • http://pagigex.tcslonaker.com/uploads/1/3/1/8/131872225/fazewobikosa_xojexalovizu_selas.pdfIn PDF document text
    • http://files.irinakhromova.com/uploads/1/3/1/4/131406715/1499679.pdfIn PDF document text
    • http://files.5starstreams.com/uploads/1/3/2/7/132741109/4e9dc78675237c.pdfIn PDF document text
    • http://files.westport.votersguide.info/uploads/1/3/0/8/130873872/5732686.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/1/0431/7547/7407/files/91950152688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/22370508761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/nafiwuwipubupiluwup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3178/7670/files/57846615561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/bizituvetisunuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/67521119669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6088/files/anime_guy_crying.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/samknows_whitebox_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/lasifalapikepunetelaxakug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/datikaduriru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/vubuzodarugaseziwux.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 7

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_off00006146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6146 5160 bytes
SHA-256: 4707c5e18aac8d770c1dc1da57c1951bda700e9a9a17fd3e8068bc433b7784b8
font_01_sfnt_off000072d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D7 10464 bytes
SHA-256: 91d0facffc733a27567be9b0b16df559c8331a76ce790ff39d4eaef7b713c0ec

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