MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains embedded links, one of which, 'https://ttraff.link/pify?keyword=acorn+stairlift+manual', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a manual for an Acorn stairlift, indicating a social engineering lure. The presence of numerous other links, many pointing to static.usrfiles.com, suggests a link farm or content distribution network used to host the malicious content. The ML classifier also 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.link/pify?keyword=acorn+stairlift+manual
- http://nafomidaf.aivets2018.eu/uploads/1/3/2/8/132814969/0dddc8bd0e6c00.pdf
- http://files.bradnerbarker.com/uploads/1/3/1/6/131606965/goweva.pdf
- https://static.usrfiles.com/ugd/b13fd1_eaac788001074e42a5d3142bb0b83ccf.pdf
- https://static.usrfiles.com/ugd/b8c837_bcd6fcef16a249e19f03c60d404960e0.pdf
- https://static.usrfiles.com/ugd/c20ea7_95db1c5683ae418ca1fadc7463ff2a90.pdf
- https://static.usrfiles.com/ugd/575363_5f749c44bdfd4ffd9258daf3b09ceac9.pdf
- https://static.usrfiles.com/ugd/5438e3_cfeb8b17270c441f8fca77532704d704.pdf
- https://static.usrfiles.com/ugd/18ee90_22ea2fd15ff24f168a53fec0fca67240.pdf
- https://static.usrfiles.com/ugd/9374a7_d420f9c1332f448b954d0e24e3175526.pdf
- https://static.usrfiles.com/ugd/f63f29_cf56d2067a1b425986abe5bdde257c96.pdf
- https://cdn.shopify.com/s/files/1/0438/2490/6397/files/93151189911.pdf
- https://cdn.shopify.com/s/files/1/0434/6331/1512/files/74015847913.pdf
- https://cdn.shopify.com/s/files/1/0428/0962/2687/files/warfarin_guidelines.pdf
- https://cdn.shopify.com/s/files/1/0430/2805/4169/files/zetik.pdf
- https://cdn.shopify.com/s/files/1/0434/3293/5574/files/branchement_feux_additionnel_r1200gs.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_off0000513a.bin5a0a37cddd886464d88566cf3d03edc757b84606a71ea9487b0f1a7b8a13080b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x513A | 5016 bytes |
font_01_sfnt_off00006238.bin85b0b3b3a3878a44619076d0c4a1548eaba511bd7f30f62a7e657c7f01a7c621 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6238 | 9896 bytes |
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