MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an approval request letter. The document also hosts a large number of external PDF links, many hosted on Shopify, likely as part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.
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=approval+request+letter+pdf
- http://files.natalieberry.net/uploads/1/3/1/8/131872137/sipuxogivasiwinegog.pdf
- http://files.psumocktrial.org/uploads/1/3/2/7/132740408/joforubejetolo-falikad-gefogizi-lumomojof.pdf
- http://files.koreasda.com/uploads/1/3/1/1/131163898/7197526.pdf
- http://files.xoxoperformance.org/uploads/1/3/0/7/130775257/zirapaxapimu.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
- https://cdn.shopify.com/s/files/1/0436/9586/6010/files/dosevekesetupu.pdf
- https://cdn.shopify.com/s/files/1/0430/7111/1330/files/vafawubu.pdf
- https://cdn.shopify.com/s/files/1/0434/8664/2336/files/77078622219.pdf
- https://cdn.shopify.com/s/files/1/0433/3246/8904/files/jawutifojizen.pdf
- https://cdn.shopify.com/s/files/1/0434/5721/6678/files/davids_bridal_sales_2017.pdf
- https://cdn.shopify.com/s/files/1/0433/2149/1621/files/28942888883.pdf
- https://cdn.shopify.com/s/files/1/0441/3744/7576/files/2_legit_2_quit_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0430/4545/3985/files/35491139321.pdf
- https://cdn.shopify.com/s/files/1/0432/0080/7070/files/feroroloxuxipanawewoboz.pdf
- https://cdn.shopify.com/s/files/1/0437/6032/0663/files/99837624709.pdf
- https://cdn.shopify.com/s/files/1/0435/7236/3432/files/nirowazuvuleje.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_off00008448.bin56d73a5a9a95e6ecd265bd3a75da5d916d6e287c71ca9b912bd98a16ec06c14a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8448 | 5208 bytes |
font_01_sfnt_off00009610.bin9bdfa833d7f8c54ab9c8c29043c92300764994c6f1b287df5a0ce20ce09d1bc6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9610 | 10524 bytes |
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