MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=english+worksheets+pdf+free'. The document body, though heavily obfuscated, contains references to 'English worksheets pdf free', suggesting a lure to attract users to click on the malicious links. The presence of multiple Shopify URLs, some confirmed benign and others unknown, alongside the malicious redirector, indicates a link farm strategy to obscure the final malicious destination.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF 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.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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.ru/pify?keyword=english+worksheets+pdf+free In PDF document text
- http://poriboku.admandwong.com/uploads/1/3/1/4/131407355/b29aa135a33.pdfIn PDF document text
- http://viwapume.newlandfilms.co.uk/uploads/1/3/2/7/132710780/cd12ac6735.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/1/0438/6439/1845/files/anatomy_and_physiology_for_nurses_at_a_glance.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9735/0554/files/causes_of_procrastination_among_students.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/2938/8699/files/pedinunufigositi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2308/1378/files/short_answer_type_test_in_english.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/2837/2886/files/r_markdown_html_cheat_sheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/4533/9814/files/zotagejuxogilot.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/4323/2661/files/hindu_astrology.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3153/5509/files/children_s_alphabet_picture_books.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/1338/1028/files/rafamapesaruxobowesop.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2530/0629/files/simple_past_mixed_exercises_with_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8549/6482/files/96233857047.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/8524/1256/files/multiplication_and_division_worksheets_2_5_10.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8044/1238/files/zimewemanowawuw.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.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000633e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x633E | 5208 bytes |
SHA-256: 443a84f649e0eca6abfa434eb5ddb064fc83d71c75c585a5efe9aa7a47dbe360 |
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font_01_sfnt_off00007502.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7502 | 10120 bytes |
SHA-256: 448b5a6bb6479682aff714fc3cfbc7b2e57cc68577a289e08ff2303364bbc57c |
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