MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a lure related to 'Aetna provider credentialing'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages. The file also contains a large number of links to PDFs hosted on static.usrfiles.com, which are likely part of a link farm to improve SEO for the malicious redirector.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
-
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.
-
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.
-
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.
-
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.me/wix?keyword=aetna+provider+credentialing+request+form
- https://static.usrfiles.com/ugd/97aff7_808c7220962a470f9bc02e8ee57d05c6.pdf
- https://static.usrfiles.com/ugd/bf07b1_b4b37bb8cb6c41f0a63bc36702e8f00a.pdf
- https://static.usrfiles.com/ugd/4d400c_3785ee8399f0419495e332b011f7ddb3.pdf
- https://static.usrfiles.com/ugd/fbccce_bdf62318e6ca480a9312616fe3234246.pdf
- https://static.usrfiles.com/ugd/b91566_e197395b3d6540b081579ee8fad171ef.pdf
- https://static.usrfiles.com/ugd/9b5f63_6e69d52b4f3d4580a55ff77a6ef91d8d.pdf
- https://static.usrfiles.com/ugd/c618e9_2431a22ea4d645afa981accdf423e082.pdf
- https://static.usrfiles.com/ugd/c1c462_92eeb8f7b4464d648bb46bdc8ba7ad38.pdf
- https://static.usrfiles.com/ugd/67e251_cee85b2146a9410baa61a4810b608483.pdf
- https://static.usrfiles.com/ugd/a2ebd8_b4075297420c4f52a16507238cc13fbd.pdf
- https://static.usrfiles.com/ugd/3f4b99_e6b9fa56d3ab47168bc6b8beb5ca7893.pdf
- https://static.usrfiles.com/ugd/d9d1f5_1c122f3d265b4e6689026f475a297c88.pdf
- https://static.usrfiles.com/ugd/b8c837_afee9af970f54e318101ba4a7c456c42.pdf
- https://static.usrfiles.com/ugd/4d6844_537ce826fd464465b285467646eb0f80.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_off00006068.binb7da73aaf37aaa3ef3ad2f51d7b062de16c46f32b93c7243d88401ccf04c083d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6068 | 5652 bytes |
font_01_sfnt_off00007391.bin84a1192cdfbd814ceb0b9de20647ed35b0ee3c49263060bc62b37f48bd621c43 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7391 | 13788 bytes |
Open this report in the interactive analyzer, or submit your own file for analysis.