MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to distribute malicious content. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=days+of+the+week+in+spanish+worksheet+pdf'. The document body, though partially corrupted, contains text related to 'Days of the week in spanish worksheet pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous Shopify-hosted PDF links further indicates a link farm strategy.
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=days+of+the+week+in+spanish+worksheet+pdf In PDF document text
- http://files.johnfnorland.com/uploads/1/3/1/3/131381078/sujewugiwi.pdfIn PDF document text
- http://tavipofet.housingtrust.org/uploads/1/3/1/0/131070450/be074be625b55.pdfIn PDF document text
- http://files.firstclassathletics.com/uploads/1/3/1/4/131406701/1952b245e.pdfIn PDF document text
- http://files.indorsia.com/uploads/1/3/0/7/130775257/meveziwagom_zesima_difosodesote.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/1/0429/7916/4314/files/blood_pressure_chart_by_age_and_height.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/6974/1983/files/xanojurogumisikasakal.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9902/1717/files/78176218656.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/3532/0735/files/33364705216.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8847/8365/files/rebopin.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6292/7263/files/introduction_to_econometrics_stock_watson.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5483/3557/files/lebabule.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0147/9321/files/48560351385.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3080/5671/files/gugexunazepisavedepa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/7441/2949/files/introduction_to_statistical_quality_control.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9209/8724/files/jisujakesiniziwafuvo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/0133/8266/files/breeds_of_cattle_and_their_characteristics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/2683/1784/files/88187383973.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4043/9446/files/fosidasafakunugen.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_off00006c58.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6C58 | 5356 bytes |
SHA-256: 8a6f51420ca490b7513468fccfef4b255fc365100ccf2ff2da665c32449c0500 |
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font_01_sfnt_off00007e98.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7E98 | 10192 bytes |
SHA-256: 95560f2190e6988026226295b8f3c29e167063cff4ca8729f63b3f82eda9789a |
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