MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains embedded links, one of which points to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'bbc learning english listening pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and distribute malicious content. The ML classifier strongly flagged this PDF as malicious.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
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=bbc+learning+english+listening+pdf In PDF document text
- http://files.shonkalay.com/uploads/1/3/1/4/131438629/6575557.pdfIn PDF document text
- http://files.bioremediationaquaculture.com/uploads/1/3/2/7/132740633/gapabasotiroxut.pdfIn PDF document text
- http://xinoli.landofmadmen.com/uploads/1/3/0/8/130813765/puzok.pdfIn PDF document text
- http://naxekap.inaheadofthecurve.com/uploads/1/3/1/1/131164250/3987683.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0435/0751/5558/files/45983113686.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3681/9104/files/carmilla_castellano.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/3023/1712/files/jajababexovete.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/9199/0430/files/datujon.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/2316/3801/files/susamimopudifilisesunoron.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8312/8214/files/rearrange_pages_in_adobe_reader_x.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7155/3189/files/jelikazilugeminezizabi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2230/2888/files/guvunetut.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/1368/5927/files/soxuxapopofigij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9676/8665/files/is_david_archuleta_gay.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6535/2097/files/tisitetemobuzuli.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5975/6708/files/20140770209.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8450/4474/files/big_ideas_simply_explained_mythology.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0001eda4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1EDA4 | 5284 bytes |
SHA-256: bfd1bce211e525fdbff6aa77c80a40be844c93b0d129d613ffb5c078b6630628 |
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font_01_sfnt_off0001ff88.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1FF88 | 10668 bytes |
SHA-256: bab229342ad5cdb5d475672329e128000c058051b719aab0640147f3d9a6c690 |
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font_02_sfnt_off000223e7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x223E7 | 4324 bytes |
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230 |
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