MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is an 'answer key' for an exam, aligning with a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.
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=answer+key+mpsc+2019+combine+pre
- http://files.goodlifedaily.org/uploads/1/3/1/4/131408899/0651af0.pdf
- http://files.juliewilder.net/uploads/1/3/1/4/131483830/3147075.pdf
- https://cdn.shopify.com/s/files/1/0427/5650/5756/files/congenital_heart_disease_causes.pdf
- https://cdn.shopify.com/s/files/1/0432/6785/0390/files/sagilaxabeweresever.pdf
- https://cdn.shopify.com/s/files/1/0434/9752/1317/files/delhi_metro_map_file.pdf
- https://cdn.shopify.com/s/files/1/0430/5872/5015/files/soxugiromukavufadinax.pdf
- https://cdn.shopify.com/s/files/1/0430/9362/2935/files/dispute_debt_collector_credit_report.pdf
- https://cdn.shopify.com/s/files/1/0429/3237/1622/files/99051224273.pdf
- https://cdn.shopify.com/s/files/1/0430/5915/1009/files/guiame_espiritu_santo_stormie_omartian.pdf
- https://cdn.shopify.com/s/files/1/0431/9825/1165/files/69710543374.pdf
- https://cdn.shopify.com/s/files/1/0435/4405/1871/files/ksrtc_internship_report.pdf
- https://cdn.shopify.com/s/files/1/0433/8375/0821/files/gta_5_cheats_pc_cars.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_off00005a71.bin4d8fcae91931aa4c900f600163a48f91591714d6799e68d78635ce0b9b6a6494 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5A71 | 5704 bytes |
font_01_sfnt_off00006dde.bin829aa343e1729b416f13b11e333a65d6111b3692a8383d5add5b0fa976135024 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6DDE | 9708 bytes |
font_02_sfnt_off00008f62.bina2c4b5fd43d4912e6d3f31f4ae8916b77f94a465ae5e6a5475d1fcb704229908 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8F62 | 9936 bytes |
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