MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a mass of external links, including a primary link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the text 'Happy birthday song free for brother' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious verdict.
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.ru/pify?keyword=happy+birthday+song+free++for+brother
- http://files.skilledlearners.com/uploads/1/3/2/6/132681394/2003340.pdf
- http://files.cathstonardtextilearts.com/uploads/1/3/0/8/130874058/5808339.pdf
- http://files.averytruittdesigns.com/uploads/1/3/1/4/131438113/juwaxapuz_bowavuno_bibokovuxesefin_rejomad.pdf
- https://cdn.shopify.com/s/files/1/0438/4597/6224/files/c_char_array_to_string.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
- https://cdn.shopify.com/s/files/1/0428/8829/8662/files/fopegelovobiwazavi.pdf
- https://cdn.shopify.com/s/files/1/0430/2408/9242/files/56837737886.pdf
- https://cdn.shopify.com/s/files/1/0428/3590/2631/files/92810881553.pdf
- https://cdn.shopify.com/s/files/1/0434/1573/2381/files/gebuwidolunotizotuz.pdf
- https://cdn.shopify.com/s/files/1/0435/3366/4408/files/nadavagofusakokipakeligus.pdf
- https://cdn.shopify.com/s/files/1/0437/7001/9994/files/today_football_highlights.pdf
- https://cdn.shopify.com/s/files/1/0431/6174/7605/files/42190880930.pdf
- https://cdn.shopify.com/s/files/1/0463/3211/7147/files/33561863883.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_off000067b8.bin19b86b2823d34f0ccb277260afad103342a7226a531b828ef142783e39107416 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x67B8 | 5476 bytes |
font_01_sfnt_off00007a4a.bincbc1ef1a4dc4fdbbdf8be99fc98fc6dfdd5d773fe50732478ec457f5a65bcdc1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7A4A | 10088 bytes |
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