MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Brain teasers for high school pdf' and the malicious URL, suggesting a lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure.
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.com/pify?keyword=brain+teasers+for+high+school+pdf
- http://files.meanevilstepteacher.com/uploads/1/3/1/3/131398605/kowilupe.pdf
- http://files.baconandbears.com/uploads/1/3/0/9/130969435/dijut.pdf
- http://files.aquinasphysics.com/uploads/1/3/1/6/131606807/4f1fa203bcbaed.pdf
- https://cdn.shopify.com/s/files/1/0436/0100/2664/files/dapopedobe.pdf
- https://cdn.shopify.com/s/files/1/0432/1568/3744/files/basis_set_superposition_error.pdf
- https://cdn.shopify.com/s/files/1/0432/5641/4363/files/fabufopu.pdf
- https://cdn.shopify.com/s/files/1/0429/3849/9235/files/xefewuvogig.pdf
- https://cdn.shopify.com/s/files/1/0434/5135/1200/files/toefl_sample_tests.pdf
- https://cdn.shopify.com/s/files/1/0432/9072/2469/files/66411756305.pdf
- https://cdn.shopify.com/s/files/1/0430/0223/2983/files/brassage_gntique.pdf
- https://cdn.shopify.com/s/files/1/0434/1576/5159/files/give_me_liberty_apush_textbook.pdf
- https://cdn.shopify.com/s/files/1/0434/2353/1158/files/codex_calixtinus_download.pdf
- https://cdn.shopify.com/s/files/1/0427/6482/8838/files/46427435322.pdf
- https://cdn.shopify.com/s/files/1/0427/9032/2335/files/48441657224.pdf
- https://cdn.shopify.com/s/files/1/0434/2700/4572/files/76609042731.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/
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00009a67.binf5a4f54b598c5a5cf359b4d3c3b51596b478a42f59d48b01073ed392f0da13c0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9A67 | 5256 bytes |
font_01_sfnt_off0000ac38.bin2581dc1d1a017824f92785a2f9bd7881aa1e4c66935700c7204371dbd71b8309 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAC38 | 10664 bytes |
font_02_sfnt_off0000d078.binff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD078 | 4324 bytes |
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