Malicious PDF — malware analysis report

Static analysis result for SHA-256 46285b50df6a4c3a…

MALICIOUS

PDF

37.6 KB Created: 2020-08-09 02:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fae455395d3a985ffae597602a283d3 SHA-1: 278f627baa85b8b81c030e0e69d2306b706488bf SHA-256: 46285b50df6a4c3a4adb6eacd85001276637f4737df179d246b0f7bc882b6c0d
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as free downloads, but redirects to a malicious URL (https://ttraff.com/pify?keyword=aula+internacional+1+pdf+free+download). This indicates a social engineering tactic to lure users to malicious infrastructure. 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.com/pify?keyword=aula+internacional+1+pdf+free+download In PDF document text
    • http://files.melodydye.com/uploads/1/3/0/8/130814083/jejuges-wujuvuvewo-wawasajakojeki.pdfIn PDF document text
    • http://kibafi.sfcentralsda.org/uploads/1/3/1/3/131383483/2250fc7cd079.pdfIn PDF document text
    • http://xunefa.cantorcarl.com/uploads/1/3/1/6/131606552/6275939.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/1/0432/1656/8482/files/9010642768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4783/6065/files/hoffman_hematology_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/5077766374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/vevororila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/lidubefaxakajujexixotugal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/cognitive_development_in_late_adulthood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/61435583446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0772/8023/files/98749846392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/81314210387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/ubuntu_16._04_startup_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/xulakobutakulaxotagira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/mathematical_biology_2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43FA 4976 bytes
SHA-256: 0627b771da9c2f82e7751279b15d0fde474073f510edcf16d1a15a354922ae6a
font_01_sfnt_off00005536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5536 5104 bytes
SHA-256: f66ca778759d47de187d56bb5bebacecde5c7c82a3b2d459b8ffe42b47c5373a
font_02_sfnt_off000066bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BF 9516 bytes
SHA-256: 5983a68d4fc48f051d356f4bd7a8f5677eefaca6f93082f185e4783fa2b28b37

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