MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains a malicious redirector link that is disguised as a tax worksheet calculator, aiming to trick users into clicking it. The ML classifier strongly indicates maliciousness, and the PDF is part of a link farm, suggesting a campaign to distribute malicious content. The primary IOC is the redirector URL used in the lure.
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/wb?keyword=schedule%20d%20tax%20worksheet%202017%20calculator
- http://latumizu.tormonbrothers.com/uploads/1/3/0/7/130775934/kikodisogogeludobul.pdf
- http://files.southsidenazarenechurch.ca/uploads/1/3/1/4/131437599/didejugitexo.pdf
- http://files.ocscc953.ca/uploads/1/3/0/8/130874398/5965750.pdf
- http://files.kristinsfinefoods.com/uploads/1/3/2/7/132712040/denewevejuku.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/1458/6521/files/ielts_simon_writing_task_1.pdf
- https://cdn.shopify.com/s/files/1/0451/3352/9241/files/anthropology_notes_for_ias.pdf
- https://cdn.shopify.com/s/files/1/0432/9416/3109/files/treatment_for_malaria.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
- https://cdn.shopify.com/s/files/1/0437/4937/6161/files/zebapapibutaketiki.pdf
- https://cdn.shopify.com/s/files/1/0440/5932/8662/files/international_marketing_16th_edition.pdf
- https://cdn.shopify.com/s/files/1/0432/8731/4585/files/xasidobowanuzawiluvuto.pdf
- https://cdn.shopify.com/s/files/1/0432/3137/9619/files/kozowudiruwenoxiwiza.pdf
- https://cdn.shopify.com/s/files/1/0437/6916/8021/files/amine_functional_group.pdf
- https://cdn.shopify.com/s/files/1/0431/7013/6218/files/12v_dc_brushless_fan_motor.pdf
- https://cdn.shopify.com/s/files/1/0428/0591/9903/files/fotuxagopadukeg.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/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005e43.bin70d3c0e64be0a8a862335f383bc9aad7189e4b3d11dd734da63cc76d463c5c28 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5E43 | 5760 bytes |
font_01_sfnt_off000071ed.bin3bb2fca5c8a6239ff9a3327482894b8257e16c72890eaef9664ad19a3f2776b0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x71ED | 10412 bytes |
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