MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains a malicious redirector link disguised as a conference meeting invitation. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The file also contains a large number of links to external PDFs, many hosted on static.usrfiles.com, which is flagged as a link farm.
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/wix?keyword=conference+meeting+invitation+template
- https://static.usrfiles.com/ugd/6cfc61_bbbd14705f734143ac28b96bfcf8306f.pdf
- https://static.usrfiles.com/ugd/7041e4_49e0d1aa8481448389cf43fd0dc08305.pdf
- https://static.usrfiles.com/ugd/b8c837_32b88497fe0d4453ae700cd695b252f5.pdf
- https://static.usrfiles.com/ugd/c836c3_bc33b79c7d714bd9b1b9d084f5ae99f3.pdf
- https://static.usrfiles.com/ugd/c33cdb_7caa8da0211e46df950a80450ba3160b.pdf
- https://static.usrfiles.com/ugd/ef253e_01887db1d5ed462798c7c85c1a9cb903.pdf
- https://static.usrfiles.com/ugd/ce5d00_cc42c977748c4d239da13eda8798e878.pdf
- https://cdn.shopify.com/s/files/1/0430/9578/5621/files/13683004959.pdf
- https://cdn.shopify.com/s/files/1/0433/0576/2974/files/55652318911.pdf
- https://cdn.shopify.com/s/files/1/0430/9227/9460/files/venamebagowefumaseke.pdf
- https://cdn.shopify.com/s/files/1/0435/8628/9832/files/makiwupi.pdf
- https://static.usrfiles.com/ugd/136d07_e53b57a89e604103ae05fae1a31598be.pdf
- https://static.usrfiles.com/ugd/3ceeb9_4b91d71c05db4d9fbd9c26ab7d29e6f2.pdf
- https://static.usrfiles.com/ugd/b8c837_5e363015ff504085a3de576f5df0ec33.pdf
- https://static.usrfiles.com/ugd/b0cd75_216f4851106f4f4b932decbf93550829.pdf
- https://static.usrfiles.com/ugd/45e30f_8425edbda5dd442fabf3a676c14898bf.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_off000068b6.bin43838a23806b009384fea3ef00a0e9b294f875b4139b443c26a482eb16cbeee2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x68B6 | 5124 bytes |
font_01_sfnt_off00007a1a.bin29aa8c9823ec933a2160178117809204b2d879533a46fe5addf4ab60fee95afb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7A1A | 10112 bytes |
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