Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae7e4b81b50f945…

MALICIOUS

PDF

41.1 KB Created: 2020-08-12 09:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c7ea9ff419cdf5b2ffc80913aa1332a7 SHA-1: 7172b0db598e7b839c756eb5bb144315f212fc2f SHA-256: 5ae7e4b81b50f9453e5f81eaf50fb61f9d48e5e97b9d8e84a08a3d3e94aa73ff
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to redirector infrastructure designed to obscure the final destination. The primary redirector URL, 'https://ttraff.cc/wb?keyword=economics%20class%209th%20ncert%20pdf', suggests a lure related to educational content. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-themed links further supports a malicious intent, likely for phishing or malware distribution.

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/wb?keyword=economics%20class%209th%20ncert%20pdf In PDF document text
    • http://zanipij.erotickookiekove.com/uploads/1/3/1/3/131398455/gafobedozemagob.pdfIn PDF document text
    • http://files.enlightenthejourney.com/uploads/1/3/2/7/132712093/xidafevebij-tanupomagurug-tedakelabawibe.pdfIn PDF document text
    • http://files.mountainbodyworkers.org/uploads/1/3/0/8/130874012/3254441.pdfIn PDF document text
    • http://files.sttimothyswv.org/uploads/1/3/0/8/130813511/judijexadabemof.pdfIn PDF document text
    • http://xovobaf.camping-hire-and-sales.com/uploads/1/3/1/4/131407440/6754609.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/1/0432/7574/7484/files/o_ativista_quantico_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/volcano_plot_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/tedapajovedudajokel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/98710053080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1475/5228/files/aptitude_test_for_class_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6497/4742/files/sukadufumolenipegatag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1872/1192/files/philippine_accounting_standards_complete_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/kapopizoserovekop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/translate_algebraic_expressions_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/1742439043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/essential_words_for_the_ielts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/teas_study_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 5508 bytes
SHA-256: a0fec20924568fa54015f349e4298b284a8040c8a8a8eb009f1ec9b63683c55b
font_01_sfnt_off000075b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 9876 bytes
SHA-256: a9e870d16119a15fc0e7c1614b1b1ecf70cf2a822206ecf30b0250de13fa98f6