MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.cc/pify?keyword=aggregate+planning+nptel+pdf', is known to redirect to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. The document body itself is heavily obfuscated and contains what appears to be a reconstructed URL, but the primary malicious activity is the distribution of links.
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/pify?keyword=aggregate+planning+nptel+pdf
- http://files.hiddenvalleymammoth.com/uploads/1/3/0/7/130776626/774d2479b.pdf
- http://files.mrwhitcher.com/uploads/1/3/1/3/131380889/nulivulamibixi.pdf
- https://cdn.shopify.com/s/files/1/0433/3332/0872/files/91111071716.pdf
- https://cdn.shopify.com/s/files/1/0427/8019/7031/files/chads2_vasc_score.pdf
- https://cdn.shopify.com/s/files/1/0435/5594/6655/files/ludobinirodelij.pdf
- https://cdn.shopify.com/s/files/1/0434/3414/7989/files/80851733373.pdf
- https://cdn.shopify.com/s/files/1/0429/4436/4710/files/pujunu.pdf
- https://cdn.shopify.com/s/files/1/0434/1117/7629/files/248138192.pdf
- https://cdn.shopify.com/s/files/1/0429/5147/5351/files/lavirafevulusuf.pdf
- https://cdn.shopify.com/s/files/1/0430/5652/9565/files/ethernet_controller_driver_windows_10.pdf
- https://cdn.shopify.com/s/files/1/0434/7936/7845/files/dearly_beloved_piano_sheet_music_easy.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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00006947.bin8ff33b4a8e0e58975e24543c18dcc6547bb5933857a5955bece3c01c1fe8dbf3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6947 | 5020 bytes |
font_01_sfnt_off00007a6a.bin76afe013f79fdfa6eb5f3988939adb468117106f9d46c76e4a96f9b4b5aa00da |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7A6A | 10204 bytes |
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