MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains multiple embedded links pointing to redirector infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to drive traffic to potentially malicious sites, likely for phishing or malware delivery.
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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Urgency / deadline lure low SE_URGENCY_LUREDocument contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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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.link/wix?keyword=python+vs+small+basic In PDF document text
- http://files.cuastt.com/uploads/1/3/1/3/131398591/9247193.pdfIn PDF document text
- http://files.veljre.com/uploads/1/3/1/4/131409037/manepitejug.pdfIn PDF document text
- http://files.kensnowphotographer.com/uploads/1/3/0/7/130775588/bafolegemagokexif.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://24353d1b-6f74-4dbb-b253-891c29c5a8f6.filesusr.com/ugd/70e7d4_161000755c3e4688b8023683af4720d5.pdf?index=trueIn PDF document text
- https://1a068b3d-0def-492f-8108-a593fbac1533.filesusr.com/ugd/234f58_74b2a23993c04e719e6598b03d6ee98b.pdf?index=trueIn PDF document text
- https://bab55eb1-1d98-4bd0-bfd5-6396c9e60edb.filesusr.com/ugd/8c5bc8_cc622140f1344721a54ff7fb512c5e13.pdf?index=trueIn PDF document text
- https://e09263a8-9900-4752-b250-3de66e789ca0.filesusr.com/ugd/b0c717_3ff9c94df59044d0b5edfad0c1d9ae76.pdf?index=trueIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/9641/6161/files/oxford_bookworms_starter_sally_s_phone.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/0467/4727/files/poxesuveginuteva.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/6709/7756/files/19306530895.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/2627/6775/files/ielts_writing_task_2_answer_sheet_sample.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/8961/7311/files/fumabisemon.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/6673/7311/files/febrile_neutropenia_idsa_guidelines.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/4758/1856/files/50196977086.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0465/0467/3430/files/volcano_box_driver_download_for_windows_7.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
🗂 Part of campaign:
cuastt.com
3 samples
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005fac.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5FAC | 5244 bytes |
SHA-256: a535c44619f414931b48e6f904d6c2139699421727997b76ec88075ed61b637d |
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font_01_sfnt_off0000716a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x716A | 10136 bytes |
SHA-256: db69247276189d1383d2ea3d768ba9471222567890a8fc82585bc49f6ebd3282 |
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