MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains embedded links that redirect to a known malicious redirector, ttraff.cc, which is likely part of a link farm designed for SEO manipulation. The document body, though partially corrupted, contains the phrase 'Free vpn for android in china' and the malicious URL, suggesting a lure to entice users to click on the malicious links. 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.cc/pify?keyword=free+vpn+for+android+in+china
- http://bupob.keyconceptslearning.com/uploads/1/3/1/3/131383483/8441574.pdf
- http://files.stmartindp.com/uploads/1/3/0/7/130738991/7229639.pdf
- http://niwowiri.flipflopfantasy.ca/uploads/1/3/1/4/131453329/b70c8453fed8bd.pdf
- http://bonobaf.viktorcage.shop/uploads/1/3/2/7/132740541/nivasazudato.pdf
- http://megapa.tcfrcn.org/uploads/1/3/1/3/131379945/be7f5c9581665e.pdf
- https://cdn.shopify.com/s/files/1/0433/8352/1445/files/amelie_vals_piano.pdf
- https://cdn.shopify.com/s/files/1/0429/9236/9823/files/xipegewevevafuve.pdf
- https://cdn.shopify.com/s/files/1/0428/2348/3548/files/tupagojerof.pdf
- https://cdn.shopify.com/s/files/1/0448/0784/8096/files/applications_of_machine_learning_in_cyber_security.pdf
- https://cdn.shopify.com/s/files/1/0441/3099/2280/files/the_ultimate_javascript_manual_2020.pdf
- https://cdn.shopify.com/s/files/1/0436/2685/6610/files/milovigabumalifezixetom.pdf
- https://cdn.shopify.com/s/files/1/0437/8276/6743/files/komis.pdf
- https://cdn.shopify.com/s/files/1/0432/0316/6369/files/chicken_farming_business_plan.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_off0000644e.bin0a670397e17f625c5b9bcd373d0aad0fab4dd23704f81d6988f51d511b05de72 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x644E | 5048 bytes |
font_01_sfnt_off0000757f.bin587d7ef58b91f027ec8761cb4413a64f90c6aecdd2e1209bc2bb8510a52cc83f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x757F | 10292 bytes |
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