MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF was identified as malicious due to a high ML score and the presence of numerous embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=textbook+of+biochemistry+for+medical+students+pdf+download'. The document also functions as a link farm, embedding a large number of external PDF links, many of which point to Shopify domains, likely to appear legitimate. No scripts were extracted from this sample.
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=textbook+of+biochemistry+for+medical+students+pdf+download In PDF document text
- http://files.hemporiumbeads.com/uploads/1/3/2/6/132682093/7327596.pdfIn PDF document text
- http://jewad.yourownpathyoga.com/uploads/1/3/0/9/130968921/lejij.pdfIn PDF document text
- http://komewep.alittlearttherapy.com/uploads/1/3/0/9/130969368/poxinusoredon.pdfIn PDF document text
- http://files.chickhillguideservice.com/uploads/1/3/0/7/130739658/pijajulikugisob_mubaxupakew_saguwizala_dizof.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/1/0427/9166/5830/files/jipuguxogikiluzugidob.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7500/9696/files/wave_equation_derivation.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/1050/5379/files/bias_variance_decomposition.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8063/6833/files/argumentative_speech_example.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9088/6312/files/namafasuxijegidodugugan.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/1129/0782/files/30459187582.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5064/7204/files/53611944350.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8025/3593/files/time_servers_address.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8670/8893/files/blender_3d_animation_tutorial.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3276/3801/files/55852591956.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizazuvolabemonixodokij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/2045/1997/files/86558851590.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/0291/9074/files/divewakisepem.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_off0000644b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x644B | 5808 bytes |
SHA-256: d7ef921d8b37c35bd35427557355f510cdecb3264f8d35264985ed4766c78b37 |
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font_01_sfnt_off00007801.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7801 | 10528 bytes |
SHA-256: 5cf756b7dccf7f92186bbb04828f3df0954237f96af62633305dbf98d88d82e6 |
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