Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0e246e44957254…

MALICIOUS

PDF

46.2 KB Created: 2020-08-23 03:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f57b4e1d93b712897c806823aef19a29 SHA-1: 244712c081d1ef60cfda7893a54714c420ba2923 SHA-256: 4a0e246e44957254c1a07f9708c6de00ac89ec896f04fd398bb0b66da28f7394
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text suggesting it is a 'certificate design format in ms word', which is a common lure. The ML classifier also strongly flagged this PDF as malicious.

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=certificate+design+format+in+ms+word In PDF document text
    • http://files.aoptech.org/uploads/1/3/2/6/132682303/bijuwe_duseru.pdfIn PDF document text
    • http://files.marcuspatchingcreations.com/uploads/1/3/2/6/132681545/e0104507426.pdfIn PDF document text
    • http://files.ocalumninorthtexas.com/uploads/1/3/2/6/132683111/df3c5a47e55671.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/1/0463/1638/8512/files/8248827175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6278/7225/files/ketojuvaposetux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3187/8049/files/bsf_tradesman_previous_year_question_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5267/6773/files/beps_action_1_final_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/24520282956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/9975/9268/files/halloween_figurative_language_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/pojajivolomajovarin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5811/files/futuxojej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/xomazekunafutitigugudob.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D3 5308 bytes
SHA-256: a57d02f30aee3d4e4c4055bb51082e3cc0ca0685d5f2a8235c44b13067c5810a
font_01_sfnt_off000089d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D1 10008 bytes
SHA-256: 576df1a204d83d413ad0cd62c31efe8db7a6ab1a4f1d71cdc0f9f6ccc3292ab9

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