Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7efdcf8d1acb813…

MALICIOUS

PDF

50.2 KB Created: 2020-08-14 17:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44fc2df7dfbbd9d6268808fba8fc674b SHA-1: 3c768a64e86dac315b6189f90ce687a612369538 SHA-256: d7efdcf8d1acb813f6c7a22f69967c17b440da5afb38645fc92fe442e5306fd9
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a title for an academic report, suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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=british+journal+of+anesthesia+case+report In PDF document text
    • http://nokizojo.e-bookeditor.com/uploads/1/3/0/7/130738973/zojofavozilavajokiv.pdfIn PDF document text
    • http://files.sharadslunchbox.com/uploads/1/3/1/3/131397973/tigib.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/1/0432/5844/5979/files/catalan_english_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7991/6967/files/makalah_asbabun_nuzul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/51153225301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/54511067180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/87850624137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2997/8526/files/femevijukorexirep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/13477405927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/jugebiwopumutebaborewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7095/5424/files/logical_operators_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5496/2590/files/approaches_and_methods.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

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_off00006d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 5228 bytes
SHA-256: 3378949338d03bc0fcd7ad43cbcdd478cd111207c7fd26d266ad7d363a4bbd18
font_01_sfnt_off00007f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5B 11952 bytes
SHA-256: 99a069921c956726fc7fe964f43aaac3dbba6678e7eaad2c8366e2f722a57050
font_02_sfnt_off0000a602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA602 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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