MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'pruebas ser bachiller 2020 resueltas pdf' and the malicious URL, suggesting a lure to download or access malicious content disguised as educational material. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, further indicating a malicious intent to distribute harmful content.
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.cc/pify?keyword=pruebas+ser+bachiller+2020+resueltas+pdf In PDF document text
- http://files.maraycosmetics.com/uploads/1/3/2/6/132682030/3236580.pdfIn PDF document text
- http://files.q-bos.com/uploads/1/3/1/8/131856883/3807978.pdfIn PDF document text
- http://files.kwsa.ca/uploads/1/3/1/3/131398145/govekimezarisi.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6402/5493/files/lulitetirowupifexevud.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8748/5342/files/vibufebevofasirapuviw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2933/1100/files/vatofiwowokimuvose.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/2669/4822/files/laminates_and_veneers_in_dentistry.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/1326/6846/files/43857289626.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/7357/5841/files/69911350568.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6989/8914/files/16704567471.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8225/2442/files/rujuvinunijemoro.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/5349/5958/files/21040013697.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/4026/8711/files/76029145068.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/9886/3771/files/37540666474.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5207/2086/files/netepazabefi.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000500f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x500F | 5324 bytes |
SHA-256: 21945cd78125e2cc74494c88f5edefa2746061a6a97d18d3afd5e4f285a881c3 |
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font_01_sfnt_off0000622e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x622E | 11160 bytes |
SHA-256: 955791799cf1e26d3fcd7010a316a887fe58cd02ecbad1d377c484672cff117e |
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font_02_sfnt_off00008685.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8685 | 4324 bytes |
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3 |
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