MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to disguise the true destination. The document body, though heavily obfuscated, contains the URL that triggers the redirector, indicating a lure for users seeking a specific textbook. No scripts were extracted, but the presence of malicious redirector links and the link farm technique strongly suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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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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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.cc/wb?keyword=rook%20textbook%20of%20dermatology%20pdf%20download
- http://files.thecitydesk.com/uploads/1/3/2/6/132695701/32802a5601.pdf
- http://files.leighcooney.com/uploads/1/3/1/6/131606431/b868a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/0408/4899/files/kovisobi.pdf
- https://cdn.shopify.com/s/files/1/0431/0561/6029/files/95006302070.pdf
- https://cdn.shopify.com/s/files/1/0431/1734/6965/files/palexamorabokevewunupe.pdf
- https://cdn.shopify.com/s/files/1/0431/5270/3645/files/introduction_to_business_statistics_7th_edition.pdf
- https://cdn.shopify.com/s/files/1/0431/0741/8273/files/21393659881.pdf
- https://cdn.shopify.com/s/files/1/0434/1789/5068/files/cedulas_para_imprimir.pdf
- https://cdn.shopify.com/s/files/1/0431/1928/0288/files/tevuruvixi.pdf
- https://cdn.shopify.com/s/files/1/0428/9452/4579/files/26967889709.pdf
- https://cdn.shopify.com/s/files/1/0433/9964/3286/files/kipidon.pdf
- https://cdn.shopify.com/s/files/1/0433/8073/6150/files/bad_meets_evil_torrent.pdf
- https://cdn.shopify.com/s/files/1/0433/3882/5887/files/74116913495.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00006e5b.bin6a199da84ccfd2bb3a7d720e081607d5af39e7297277bdd01590bc24d1a8ff9f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6E5B | 5656 bytes |
font_01_sfnt_off000081a4.bin9c5823b0f3f542d138ec9d4a7673bcf74d3ab13f02c27cdf7a0197d7cca184d2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x81A4 | 10288 bytes |
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