MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a mass of external links, many of which are hosted on Shopify but appear to be part of a link farm. One prominent link, presented as a download for a 'biochemistry textbook pdf', redirects through 'ttraff.ru', which is flagged as malicious. This suggests a social engineering attack aiming to drive traffic to malicious sites, potentially for further malware delivery or phishing. No scripts were extracted, limiting the analysis of direct execution capabilities.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=biochemistry+textbook+pdf+download In PDF document text
- http://files.kzonebaseballsba.com/uploads/1/3/1/4/131437736/2310223.pdfIn PDF document text
- http://files.tcnjcogdevlab.com/uploads/1/3/1/3/131380687/somikod.pdfIn PDF document text
- http://files.raebirdcreations.com/uploads/1/3/0/7/130775393/wekuwujobofipo_sekemed.pdfIn PDF document text
- http://files.drtadeusik.com/uploads/1/3/0/8/130873856/4d58f4626ef40d.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/1/0431/8884/6753/files/jerafodasigosutezigaku.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0452/5791/6578/files/antibiotic_associated_diarrhea.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1854/1480/files/athens_map_english.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7895/8758/files/17912846976.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/5483/9461/files/86860284396.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8746/2551/files/effects_of_globalisation_on_developing_countries.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7318/3643/files/tobawilawazo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/3821/0205/files/pavur.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/5206/4155/files/online_bitmap_image_to_converter.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/9541/5189/files/tisodiduxo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4217/7181/files/xiwedazod.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1762/3957/files/97579391631.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/2145/8853/files/25765661937.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_off000053e4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x53E4 | 5908 bytes |
SHA-256: b82762122c5451d52902987c0d89a5655c31148ce54c88bbd682a94673b13948 |
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font_01_sfnt_off000067ee.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x67EE | 9828 bytes |
SHA-256: 3d004a314427f024c1c44a4bec96013907d3edb358c59852faa8b4117d6e87d1 |
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